diff --git a/dist/lodash.compat.js b/dist/lodash.compat.js
index c2750e42c..23798ba85 100644
--- a/dist/lodash.compat.js
+++ b/dist/lodash.compat.js
@@ -1786,7 +1786,7 @@
 
     /**
      * Gets the appropriate "indexOf" function. If the `_.indexOf` method is
-     * customized this method returns the custom method, otherwise it returns
+     * customized, this method returns the custom method, otherwise it returns
      * the `baseIndexOf` function.
      *
      * @private
@@ -5394,10 +5394,9 @@
     }
 
     /**
-     * Creates an array of grouped elements, the first of which contains the
-     * first elements of the given arrays, the second of which contains the second
-     * elements of the given arrays, and so on. If a zipped value is provided its
-     * corresponding unzipped value will be returned.
+     * Creates an array of grouped elements, the first of which contains the first
+     * elements of the given arrays, the second of which contains the second
+     * elements of the given arrays, and so on.
      *
      * @static
      * @memberOf _
@@ -5409,9 +5408,6 @@
      *
      * _.zip(['fred', 'barney'], [30, 40], [true, false]);
      * // => [['fred', 30, true], ['barney', 40, false]]
-     *
-     * _.unzip([['fred', 30, true], ['barney', 40, false]]);
-     * // => [['fred', 'barney'], [30, 40], [true, false]]
      */
     function zip() {
       var array = arguments.length > 1 ? arguments : arguments[0],
@@ -6954,7 +6950,7 @@
     lodash.unzip = zip;
 
     // add functions to `lodash.prototype`
-    mixin(assign({}, lodash));
+    mixin(lodash);
 
     /*--------------------------------------------------------------------------*/
 
diff --git a/dist/lodash.compat.min.js b/dist/lodash.compat.min.js
index 4d948bc04..d03b6ba6b 100644
--- a/dist/lodash.compat.min.js
+++ b/dist/lodash.compat.min.js
@@ -46,12 +46,12 @@ if(typeof t!="number"&&null!=t){var o=u;for(t=v.createCallback(t,e,3);o--&&t(n[o
 return n},v.range=function(n,t,e){n=+n||0,e=typeof e=="number"?e:+e||1,null==t&&(t=n,n=0);var r=-1;t=Be(0,ye((t-n)/(e||1)));for(var u=Zt(t);++r<t;)u[r]=n,n+=e;return u},v.reject=function(n,t,e){return t=v.createCallback(t,e,3),At(n,function(n,e,r){return!t(n,e,r)})},v.remove=function(n,t,e){var r=-1,u=n?n.length:0,o=[];for(t=v.createCallback(t,e,3);++r<u;)e=n[r],t(e,r,n)&&(o.push(e),ke.call(n,r--,1),u--);return o},v.rest=qt,v.shuffle=Tt,v.sortBy=function(n,t,e){var r=-1,o=qe(t),a=n?n.length:0,f=Zt(typeof a=="number"?a:0);
 for(o||(t=v.createCallback(t,e,3)),Dt(n,function(n,e,u){var a=f[++r]=l();o?a.m=Bt(t,function(t){return n[t]}):(a.m=i())[0]=t(n,e,u),a.n=r,a.o=n}),a=f.length,f.sort(u);a--;)n=f[a],f[a]=n.o,o||c(n.m),p(n);return f},v.tap=function(n,t){return t(n),n},v.throttle=function(n,t,e){var r=true,u=true;if(!jt(n))throw new le;return false===e?r=false:xt(e)&&(r="leading"in e?e.leading:r,u="trailing"in e?e.trailing:u),H.leading=r,H.maxWait=t,H.trailing=u,Vt(n,t,H)},v.times=function(n,t,e){n=-1<(n=+n)?n:0;var r=-1,u=Zt(n);
 for(t=tt(t,e,1);++r<n;)u[r]=t(r);return u},v.toArray=function(n){return n&&typeof n.length=="number"?Le.unindexedChars&&kt(n)?n.split(""):s(n):Et(n)},v.transform=function(n,t,e,r){var u=qe(n);if(null==e)if(u)e=[];else{var o=n&&n.constructor;e=nt(o&&o.prototype)}return t&&(t=v.createCallback(t,r,4),(u?Xe:tr)(n,function(n,r,u){return t(e,n,r,u)})),e},v.union=function(){return ft(ot(arguments,true,true))},v.uniq=Wt,v.values=Et,v.where=At,v.without=function(n){return rt(n,s(arguments,1))},v.wrap=function(n,t){return pt(t,16,[n])
-},v.xor=function(){for(var n=-1,t=arguments.length;++n<t;){var e=arguments[n];if(qe(e)||dt(e))var r=r?ft(rt(r,e).concat(rt(e,r))):e}return r||[]},v.zip=Gt,v.zipObject=Jt,v.collect=Bt,v.drop=qt,v.each=Dt,v.eachRight=Nt,v.extend=Ye,v.methods=_t,v.object=Jt,v.select=At,v.tail=qt,v.unique=Wt,v.unzip=Gt,Ut(Ye({},v)),v.clone=function(n,t,e,r){return typeof t!="boolean"&&null!=t&&(r=e,e=t,t=false),Y(n,t,typeof e=="function"&&tt(e,r,1))},v.cloneDeep=function(n,t,e){return Y(n,true,typeof t=="function"&&tt(t,e,1))
-},v.contains=Ot,v.escape=function(n){return null==n?"":ie(n).replace(Qe,gt)},v.every=St,v.find=It,v.findIndex=function(n,t,e){var r=-1,u=n?n.length:0;for(t=v.createCallback(t,e,3);++r<u;)if(t(n[r],r,n))return r;return-1},v.findKey=function(n,t,e){var r;return t=v.createCallback(t,e,3),tr(n,function(n,e,u){return t(n,e,u)?(r=e,false):void 0}),r},v.findLast=function(n,t,e){var r;return t=v.createCallback(t,e,3),Nt(n,function(n,e,u){return t(n,e,u)?(r=n,false):void 0}),r},v.findLastIndex=function(n,t,e){var r=n?n.length:0;
-for(t=v.createCallback(t,e,3);r--;)if(t(n[r],r,n))return r;return-1},v.findLastKey=function(n,t,e){var r;return t=v.createCallback(t,e,3),bt(n,function(n,e,u){return t(n,e,u)?(r=e,false):void 0}),r},v.has=function(n,t){return n?we.call(n,t):false},v.identity=Ht,v.indexOf=zt,v.isArguments=dt,v.isArray=qe,v.isBoolean=function(n){return true===n||false===n||n&&typeof n=="object"&&he.call(n)==L||false},v.isDate=function(n){return n&&typeof n=="object"&&he.call(n)==z||false},v.isElement=function(n){return n&&1===n.nodeType||false
-},v.isEmpty=function(n){var t=true;if(!n)return t;var e=he.call(n),r=n.length;return e==$||e==M||(Le.argsClass?e==T:dt(n))||e==G&&typeof r=="number"&&jt(n.splice)?!r:(tr(n,function(){return t=false}),t)},v.isEqual=function(n,t,e,r){return at(n,t,typeof e=="function"&&tt(e,r,2))},v.isFinite=function(n){return Ie(n)&&!De(parseFloat(n))},v.isFunction=jt,v.isNaN=function(n){return Ct(n)&&n!=+n},v.isNull=function(n){return null===n},v.isNumber=Ct,v.isObject=xt,v.isPlainObject=er,v.isRegExp=function(n){return n&&X[typeof n]&&he.call(n)==J||false
-},v.isString=kt,v.isUndefined=function(n){return typeof n=="undefined"},v.lastIndexOf=function(n,t,e){var r=n?n.length:0;for(typeof e=="number"&&(r=(0>e?Be(0,r+e):Pe(e,r-1))+1);r--;)if(n[r]===t)return r;return-1},v.mixin=Ut,v.noConflict=function(){return e._=ge,this},v.noop=Qt,v.now=ir,v.parseInt=lr,v.random=function(n,t,e){var r=null==n,u=null==t;return null==e&&(typeof n=="boolean"&&u?(e=n,n=1):u||typeof t!="boolean"||(e=t,u=true)),r&&u&&(t=1),n=+n||0,u?(t=n,n=0):t=+t||0,e||n%1||t%1?(e=Fe(),Pe(n+e*(t-n+parseFloat("1e-"+((e+"").length-1))),t)):lt(n,t)
-},v.reduce=Rt,v.reduceRight=Ft,v.result=function(n,t){if(n){var e=n[t];return jt(e)?n[t]():e}},v.runInContext=g,v.size=function(n){var t=n?n.length:0;return typeof t=="number"?t:We(n).length},v.some=$t,v.sortedIndex=Kt,v.template=function(n,t,e){var r=v.templateSettings;n=ie(n||""),e=Ze({},e,r);var u,o=Ze({},e.imports,r.imports),r=We(o),o=Et(o),i=0,l=e.interpolate||N,f="__p+='",l=ae((e.escape||N).source+"|"+l.source+"|"+(l===I?O:N).source+"|"+(e.evaluate||N).source+"|$","g");n.replace(l,function(t,e,r,o,l,c){return r||(r=o),f+=n.slice(i,c).replace(P,a),e&&(f+="'+__e("+e+")+'"),l&&(u=true,f+="';"+l+";\n__p+='"),r&&(f+="'+((__t=("+r+"))==null?'':__t)+'"),i=c+t.length,t
+},v.xor=function(){for(var n=-1,t=arguments.length;++n<t;){var e=arguments[n];if(qe(e)||dt(e))var r=r?ft(rt(r,e).concat(rt(e,r))):e}return r||[]},v.zip=Gt,v.zipObject=Jt,v.collect=Bt,v.drop=qt,v.each=Dt,v.eachRight=Nt,v.extend=Ye,v.methods=_t,v.object=Jt,v.select=At,v.tail=qt,v.unique=Wt,v.unzip=Gt,Ut(v),v.clone=function(n,t,e,r){return typeof t!="boolean"&&null!=t&&(r=e,e=t,t=false),Y(n,t,typeof e=="function"&&tt(e,r,1))},v.cloneDeep=function(n,t,e){return Y(n,true,typeof t=="function"&&tt(t,e,1))},v.contains=Ot,v.escape=function(n){return null==n?"":ie(n).replace(Qe,gt)
+},v.every=St,v.find=It,v.findIndex=function(n,t,e){var r=-1,u=n?n.length:0;for(t=v.createCallback(t,e,3);++r<u;)if(t(n[r],r,n))return r;return-1},v.findKey=function(n,t,e){var r;return t=v.createCallback(t,e,3),tr(n,function(n,e,u){return t(n,e,u)?(r=e,false):void 0}),r},v.findLast=function(n,t,e){var r;return t=v.createCallback(t,e,3),Nt(n,function(n,e,u){return t(n,e,u)?(r=n,false):void 0}),r},v.findLastIndex=function(n,t,e){var r=n?n.length:0;for(t=v.createCallback(t,e,3);r--;)if(t(n[r],r,n))return r;
+return-1},v.findLastKey=function(n,t,e){var r;return t=v.createCallback(t,e,3),bt(n,function(n,e,u){return t(n,e,u)?(r=e,false):void 0}),r},v.has=function(n,t){return n?we.call(n,t):false},v.identity=Ht,v.indexOf=zt,v.isArguments=dt,v.isArray=qe,v.isBoolean=function(n){return true===n||false===n||n&&typeof n=="object"&&he.call(n)==L||false},v.isDate=function(n){return n&&typeof n=="object"&&he.call(n)==z||false},v.isElement=function(n){return n&&1===n.nodeType||false},v.isEmpty=function(n){var t=true;if(!n)return t;var e=he.call(n),r=n.length;
+return e==$||e==M||(Le.argsClass?e==T:dt(n))||e==G&&typeof r=="number"&&jt(n.splice)?!r:(tr(n,function(){return t=false}),t)},v.isEqual=function(n,t,e,r){return at(n,t,typeof e=="function"&&tt(e,r,2))},v.isFinite=function(n){return Ie(n)&&!De(parseFloat(n))},v.isFunction=jt,v.isNaN=function(n){return Ct(n)&&n!=+n},v.isNull=function(n){return null===n},v.isNumber=Ct,v.isObject=xt,v.isPlainObject=er,v.isRegExp=function(n){return n&&X[typeof n]&&he.call(n)==J||false},v.isString=kt,v.isUndefined=function(n){return typeof n=="undefined"
+},v.lastIndexOf=function(n,t,e){var r=n?n.length:0;for(typeof e=="number"&&(r=(0>e?Be(0,r+e):Pe(e,r-1))+1);r--;)if(n[r]===t)return r;return-1},v.mixin=Ut,v.noConflict=function(){return e._=ge,this},v.noop=Qt,v.now=ir,v.parseInt=lr,v.random=function(n,t,e){var r=null==n,u=null==t;return null==e&&(typeof n=="boolean"&&u?(e=n,n=1):u||typeof t!="boolean"||(e=t,u=true)),r&&u&&(t=1),n=+n||0,u?(t=n,n=0):t=+t||0,e||n%1||t%1?(e=Fe(),Pe(n+e*(t-n+parseFloat("1e-"+((e+"").length-1))),t)):lt(n,t)},v.reduce=Rt,v.reduceRight=Ft,v.result=function(n,t){if(n){var e=n[t];
+return jt(e)?n[t]():e}},v.runInContext=g,v.size=function(n){var t=n?n.length:0;return typeof t=="number"?t:We(n).length},v.some=$t,v.sortedIndex=Kt,v.template=function(n,t,e){var r=v.templateSettings;n=ie(n||""),e=Ze({},e,r);var u,o=Ze({},e.imports,r.imports),r=We(o),o=Et(o),i=0,l=e.interpolate||N,f="__p+='",l=ae((e.escape||N).source+"|"+l.source+"|"+(l===I?O:N).source+"|"+(e.evaluate||N).source+"|$","g");n.replace(l,function(t,e,r,o,l,c){return r||(r=o),f+=n.slice(i,c).replace(P,a),e&&(f+="'+__e("+e+")+'"),l&&(u=true,f+="';"+l+";\n__p+='"),r&&(f+="'+((__t=("+r+"))==null?'':__t)+'"),i=c+t.length,t
 }),f+="';",l=e=e.variable,l||(e="obj",f="with("+e+"){"+f+"}"),f=(u?f.replace(x,""):f).replace(C,"$1").replace(E,"$1;"),f="function("+e+"){"+(l?"":e+"||("+e+"={});")+"var __t,__p='',__e=_.escape"+(u?",__j=Array.prototype.join;function print(){__p+=__j.call(arguments,'')}":";")+f+"return __p}";try{var c=ee(r,"return "+f).apply(h,o)}catch(p){throw p.source=f,p}return t?c(t):(c.source=f,c)},v.unescape=function(n){return null==n?"":ie(n).replace(Ue,mt)},v.uniqueId=function(n){var t=++m;return ie(null==n?"":n)+t
 },v.all=St,v.any=$t,v.detect=It,v.findWhere=It,v.foldl=Rt,v.foldr=Ft,v.include=Ot,v.inject=Rt,Ut(function(){var n={};return tr(v,function(t,e){v.prototype[e]||(n[e]=t)}),n}(),false),v.first=Lt,v.last=function(n,t,e){var r=0,u=n?n.length:0;if(typeof t!="number"&&null!=t){var o=u;for(t=v.createCallback(t,e,3);o--&&t(n[o],o,n);)r++}else if(r=t,null==r||e)return n?n[u-1]:h;return s(n,Be(0,u-r))},v.sample=function(n,t,e){return n&&typeof n.length!="number"?n=Et(n):Le.unindexedChars&&kt(n)&&(n=n.split("")),null==t||e?n?n[lt(0,n.length-1)]:h:(n=Tt(n),n.length=Pe(Be(0,t),n.length),n)
 },v.take=Lt,v.head=Lt,tr(v,function(n,t){var e="sample"!==t;v.prototype[t]||(v.prototype[t]=function(t,r){var u=this.__chain__,o=n(this.__wrapped__,t,r);return u||null!=t&&(!r||e&&typeof t=="function")?new y(o,u):o})}),v.VERSION="2.4.1",v.prototype.chain=function(){return this.__chain__=true,this},v.prototype.toString=function(){return ie(this.__wrapped__)},v.prototype.value=Yt,v.prototype.valueOf=Yt,Xe(["join","pop","shift"],function(n){var t=fe[n];v.prototype[n]=function(){var n=this.__chain__,e=t.apply(this.__wrapped__,arguments);
diff --git a/dist/lodash.js b/dist/lodash.js
index 779b157d8..d653e5aed 100644
--- a/dist/lodash.js
+++ b/dist/lodash.js
@@ -1462,7 +1462,7 @@
 
     /**
      * Gets the appropriate "indexOf" function. If the `_.indexOf` method is
-     * customized this method returns the custom method, otherwise it returns
+     * customized, this method returns the custom method, otherwise it returns
      * the `baseIndexOf` function.
      *
      * @private
@@ -5044,10 +5044,9 @@
     }
 
     /**
-     * Creates an array of grouped elements, the first of which contains the
-     * first elements of the given arrays, the second of which contains the second
-     * elements of the given arrays, and so on. If a zipped value is provided its
-     * corresponding unzipped value will be returned.
+     * Creates an array of grouped elements, the first of which contains the first
+     * elements of the given arrays, the second of which contains the second
+     * elements of the given arrays, and so on.
      *
      * @static
      * @memberOf _
@@ -5059,9 +5058,6 @@
      *
      * _.zip(['fred', 'barney'], [30, 40], [true, false]);
      * // => [['fred', 30, true], ['barney', 40, false]]
-     *
-     * _.unzip([['fred', 30, true], ['barney', 40, false]]);
-     * // => [['fred', 'barney'], [30, 40], [true, false]]
      */
     function zip() {
       var array = arguments.length > 1 ? arguments : arguments[0],
@@ -6604,7 +6600,7 @@
     lodash.unzip = zip;
 
     // add functions to `lodash.prototype`
-    mixin(assign({}, lodash));
+    mixin(lodash);
 
     /*--------------------------------------------------------------------------*/
 
diff --git a/dist/lodash.min.js b/dist/lodash.min.js
index 8ce51d120..85a962634 100644
--- a/dist/lodash.min.js
+++ b/dist/lodash.min.js
@@ -42,7 +42,7 @@ return l(o),l(i),n},J.min=function(n,t,e){var u=1/0,o=u;if(typeof t!="function"&
 }else t=J.createCallback(t,e,3),g(n,function(n,e,u){t(n,e,u)&&(r[e]=n)});return r},J.pluck=Ve,J.property=Jt,J.pull=function(n){for(var t=arguments,e=0,r=t.length,u=n?n.length:0;++e<r;)for(var o=-1,i=t[e];++o<u;)n[o]===i&&(de.call(n,o--,1),u--);return n},J.range=function(n,t,e){n=+n||0,e=typeof e=="number"?e:+e||1,null==t&&(t=n,n=0);var r=-1;t=Ie(0,se((t-n)/(e||1)));for(var u=Xt(t);++r<t;)u[r]=n,n+=e;return u},J.reject=function(n,t,e){return t=J.createCallback(t,e,3),Nt(n,function(n,e,r){return!t(n,e,r)
 })},J.remove=function(n,t,e){var r=-1,u=n?n.length:0,o=[];for(t=J.createCallback(t,e,3);++r<u;)e=n[r],t(e,r,n)&&(o.push(e),de.call(n,r--,1),u--);return o},J.rest=qt,J.shuffle=Tt,J.sortBy=function(n,t,e){var r=-1,o=Te(t),i=n?n.length:0,p=Xt(typeof i=="number"?i:0);for(o||(t=J.createCallback(t,e,3)),St(n,function(n,e,u){var i=p[++r]=f();o?i.m=Rt(t,function(t){return n[t]}):(i.m=a())[0]=t(n,e,u),i.n=r,i.o=n}),i=p.length,p.sort(u);i--;)n=p[i],p[i]=n.o,o||l(n.m),c(n);return p},J.tap=function(n,t){return t(n),n
 },J.throttle=function(n,t,e){var r=true,u=true;if(!dt(n))throw new ie;return false===e?r=false:wt(e)&&(r="leading"in e?e.leading:r,u="trailing"in e?e.trailing:u),L.leading=r,L.maxWait=t,L.trailing=u,Vt(n,t,L)},J.times=function(n,t,e){n=-1<(n=+n)?n:0;var r=-1,u=Xt(n);for(t=tt(t,e,1);++r<n;)u[r]=t(r);return u},J.toArray=function(n){return n&&typeof n.length=="number"?p(n):xt(n)},J.transform=function(n,t,e,r){var u=Te(n);if(null==e)if(u)e=[];else{var o=n&&n.constructor;e=nt(o&&o.prototype)}return t&&(t=J.createCallback(t,r,4),(u?St:h)(n,function(n,r,u){return t(e,n,r,u)
-})),e},J.union=function(){return ft(ut(arguments,true,true))},J.uniq=Pt,J.values=xt,J.where=Nt,J.without=function(n){return rt(n,p(arguments,1))},J.wrap=function(n,t){return ct(t,16,[n])},J.xor=function(){for(var n=-1,t=arguments.length;++n<t;){var e=arguments[n];if(Te(e)||yt(e))var r=r?ft(rt(r,e).concat(rt(e,r))):e}return r||[]},J.zip=Kt,J.zipObject=Lt,J.collect=Rt,J.drop=qt,J.each=St,J.eachRight=Et,J.extend=U,J.methods=bt,J.object=Lt,J.select=Nt,J.tail=qt,J.unique=Pt,J.unzip=Kt,Gt(U({},J)),J.clone=function(n,t,e,r){return typeof t!="boolean"&&null!=t&&(r=e,e=t,t=false),Z(n,t,typeof e=="function"&&tt(e,r,1))
+})),e},J.union=function(){return ft(ut(arguments,true,true))},J.uniq=Pt,J.values=xt,J.where=Nt,J.without=function(n){return rt(n,p(arguments,1))},J.wrap=function(n,t){return ct(t,16,[n])},J.xor=function(){for(var n=-1,t=arguments.length;++n<t;){var e=arguments[n];if(Te(e)||yt(e))var r=r?ft(rt(r,e).concat(rt(e,r))):e}return r||[]},J.zip=Kt,J.zipObject=Lt,J.collect=Rt,J.drop=qt,J.each=St,J.eachRight=Et,J.extend=U,J.methods=bt,J.object=Lt,J.select=Nt,J.tail=qt,J.unique=Pt,J.unzip=Kt,Gt(J),J.clone=function(n,t,e,r){return typeof t!="boolean"&&null!=t&&(r=e,e=t,t=false),Z(n,t,typeof e=="function"&&tt(e,r,1))
 },J.cloneDeep=function(n,t,e){return Z(n,true,typeof t=="function"&&tt(t,e,1))},J.contains=Ct,J.escape=function(n){return null==n?"":oe(n).replace(ze,pt)},J.every=Ot,J.find=It,J.findIndex=function(n,t,e){var r=-1,u=n?n.length:0;for(t=J.createCallback(t,e,3);++r<u;)if(t(n[r],r,n))return r;return-1},J.findKey=function(n,t,e){var r;return t=J.createCallback(t,e,3),h(n,function(n,e,u){return t(n,e,u)?(r=e,false):void 0}),r},J.findLast=function(n,t,e){var r;return t=J.createCallback(t,e,3),Et(n,function(n,e,u){return t(n,e,u)?(r=n,false):void 0
 }),r},J.findLastIndex=function(n,t,e){var r=n?n.length:0;for(t=J.createCallback(t,e,3);r--;)if(t(n[r],r,n))return r;return-1},J.findLastKey=function(n,t,e){var r;return t=J.createCallback(t,e,3),mt(n,function(n,e,u){return t(n,e,u)?(r=e,false):void 0}),r},J.has=function(n,t){return n?me.call(n,t):false},J.identity=Ut,J.indexOf=Wt,J.isArguments=yt,J.isArray=Te,J.isBoolean=function(n){return true===n||false===n||n&&typeof n=="object"&&ce.call(n)==T||false},J.isDate=function(n){return n&&typeof n=="object"&&ce.call(n)==F||false
 },J.isElement=function(n){return n&&1===n.nodeType||false},J.isEmpty=function(n){var t=true;if(!n)return t;var e=ce.call(n),r=n.length;return e==$||e==P||e==D||e==q&&typeof r=="number"&&dt(n.splice)?!r:(h(n,function(){return t=false}),t)},J.isEqual=function(n,t,e,r){return ot(n,t,typeof e=="function"&&tt(e,r,2))},J.isFinite=function(n){return Ce(n)&&!Oe(parseFloat(n))},J.isFunction=dt,J.isNaN=function(n){return jt(n)&&n!=+n},J.isNull=function(n){return null===n},J.isNumber=jt,J.isObject=wt,J.isPlainObject=Pe,J.isRegExp=function(n){return n&&typeof n=="object"&&ce.call(n)==z||false
diff --git a/dist/lodash.underscore.js b/dist/lodash.underscore.js
index 7785aa774..0c84471f5 100644
--- a/dist/lodash.underscore.js
+++ b/dist/lodash.underscore.js
@@ -853,7 +853,7 @@
 
   /**
    * Gets the appropriate "indexOf" function. If the `_.indexOf` method is
-   * customized this method returns the custom method, otherwise it returns
+   * customized, this method returns the custom method, otherwise it returns
    * the `baseIndexOf` function.
    *
    * @private
@@ -3575,10 +3575,9 @@
   }
 
   /**
-   * Creates an array of grouped elements, the first of which contains the
-   * first elements of the given arrays, the second of which contains the second
-   * elements of the given arrays, and so on. If a zipped value is provided its
-   * corresponding unzipped value will be returned.
+   * Creates an array of grouped elements, the first of which contains the first
+   * elements of the given arrays, the second of which contains the second
+   * elements of the given arrays, and so on.
    *
    * @static
    * @memberOf _
@@ -3590,9 +3589,6 @@
    *
    * _.zip(['fred', 'barney'], [30, 40], [true, false]);
    * // => [['fred', 30, true], ['barney', 40, false]]
-   *
-   * _.unzip([['fred', 30, true], ['barney', 40, false]]);
-   * // => [['fred', 'barney'], [30, 40], [true, false]]
    */
   function zip() {
     var index = -1,
@@ -4904,7 +4900,7 @@
   /*--------------------------------------------------------------------------*/
 
   // add functions to `lodash.prototype`
-  mixin(assign({}, lodash));
+  mixin(lodash);
 
   /**
    * The semantic version number.
diff --git a/dist/lodash.underscore.min.js b/dist/lodash.underscore.min.js
index 2b242f5de..e65912447 100644
--- a/dist/lodash.underscore.min.js
+++ b/dist/lodash.underscore.min.js
@@ -35,5 +35,5 @@ for(r||!e||Cr(n[0])||(r=[]);++t<e;){var o=n[t];r?u[o]=r[t]:o&&(u[o[0]]=o[1])}ret
 },u.isElement=function(n){return n&&1===n.nodeType||false},u.isEmpty=E,u.isEqual=function(n,r){return s(n,r)},u.isFinite=function(n){return qr(n)&&!Dr(parseFloat(n))},u.isFunction=A,u.isNaN=function(n){return S(n)&&n!=+n},u.isNull=function(n){return null===n},u.isNumber=S,u.isObject=O,u.isRegExp=function(n){return n&&vr[typeof n]&&Er.call(n)==gr||false},u.isString=N,u.isUndefined=function(n){return typeof n=="undefined"},u.lastIndexOf=function(n,r,t){var e=n?n.length:0;for(typeof t=="number"&&(e=(0>t?Mr(0,e+t):$r(t,e-1))+1);e--;)if(n[e]===r)return e;
 return-1},u.mixin=Z,u.noConflict=function(){return mr._=Tr,this},u.random=function(n,r){return null==n&&null==r&&(r=1),n=+n||0,null==r?(r=n,n=0):r=+r||0,n+Sr(Wr()*(r-n+1))},u.reduce=W,u.reduceRight=z,u.result=function(n,r){if(n){var t=n[r];return A(t)?n[r]():t}},u.size=function(n){var r=n?n.length:0;return typeof r=="number"?r:Ur(n).length},u.some=P,u.sortedIndex=J,u.template=function(n,r,e){var o=u,i=o.templateSettings;n=(n||"")+"",e=j({},e,i);var f=0,a="__p+='",i=e.variable;n.replace(RegExp((e.escape||or).source+"|"+(e.interpolate||or).source+"|"+(e.evaluate||or).source+"|$","g"),function(r,e,u,o,i){return a+=n.slice(f,i).replace(ir,t),e&&(a+="'+_.escape("+e+")+'"),o&&(a+="';"+o+";\n__p+='"),u&&(a+="'+((__t=("+u+"))==null?'':__t)+'"),f=i+r.length,r
 }),a+="';",i||(i="obj",a="with("+i+"||{}){"+a+"}"),a="function("+i+"){var __t,__p='',__j=Array.prototype.join;function print(){__p+=__j.call(arguments,'')}"+a+"return __p}";try{var l=Function("_","return "+a)(o)}catch(c){throw c.source=a,c}return r?l(r):(l.source=a,l)},u.unescape=function(n){return null==n?"":(n+"").replace(Hr,d)},u.uniqueId=function(n){var r=++tr+"";return n?n+r:r},u.all=B,u.any=P,u.detect=q,u.findWhere=function(n,r){return U(n,r,true)},u.foldl=W,u.foldr=z,u.include=k,u.inject=W,u.first=V,u.last=function(n,r,t){var u=0,o=n?n.length:0;
-if(typeof r!="number"&&null!=r){var i=o;for(r=X(r,t,3);i--&&r(n[i],i,n);)u++}else if(u=r,null==u||t)return n?n[o-1]:rr;return e(n,Mr(0,o-u))},u.sample=function(n,r,t){return n&&typeof n.length!="number"&&(n=R(n)),null==r||t?n?n[0+Sr(Wr()*(n.length-1-0+1))]:rr:(n=C(n),n.length=$r(Mr(0,r),n.length),n)},u.take=V,u.head=V,Z(w({},u)),u.VERSION="2.4.1",u.prototype.chain=function(){return this.__chain__=true,this},u.prototype.value=function(){return this.__wrapped__},D("pop push reverse shift sort splice unshift".split(" "),function(n){var r=jr[n];
+if(typeof r!="number"&&null!=r){var i=o;for(r=X(r,t,3);i--&&r(n[i],i,n);)u++}else if(u=r,null==u||t)return n?n[o-1]:rr;return e(n,Mr(0,o-u))},u.sample=function(n,r,t){return n&&typeof n.length!="number"&&(n=R(n)),null==r||t?n?n[0+Sr(Wr()*(n.length-1-0+1))]:rr:(n=C(n),n.length=$r(Mr(0,r),n.length),n)},u.take=V,u.head=V,Z(u),u.VERSION="2.4.1",u.prototype.chain=function(){return this.__chain__=true,this},u.prototype.value=function(){return this.__wrapped__},D("pop push reverse shift sort splice unshift".split(" "),function(n){var r=jr[n];
 u.prototype[n]=function(){var n=this.__wrapped__;return r.apply(n,arguments),zr.spliceObjects||0!==n.length||delete n[0],this}}),D(["concat","join","slice"],function(n){var r=jr[n];u.prototype[n]=function(){var n=r.apply(this.__wrapped__,arguments);return this.__chain__&&(n=new o(n),n.__chain__=true),n}}),typeof define=="function"&&typeof define.amd=="object"&&define.amd?(mr._=u, define(function(){return u})):_r&&dr?br?(dr.exports=u)._=u:_r._=u:mr._=u}).call(this);
\ No newline at end of file
diff --git a/lodash.js b/lodash.js
index 15e7911d8..2a4984f92 100644
--- a/lodash.js
+++ b/lodash.js
@@ -2547,9 +2547,7 @@
      * _.invert({ 'first': 'fred', 'second': 'barney' });
      * // => { 'fred': 'first', 'barney': 'second' }
      *
-     * _.invert({ 'first': 'fred', 'second': 'barney', 'third': 'fred' }, true);
-     * // => { 'fred': ['first', 'third'], 'barney': ['second'] }
-     */
+n     */
     function invert(object, oneToMany) {
       var index = -1,
           props = keys(object),