Reword docs for _.tap and _.thru. [ci skip]

lodash.js

@@ -7059,10 +7059,9 @@
     }
 
     /**
-     * This method invokes `interceptor` and returns `value`. The interceptor is
-     * invoked with one argument; (value). The purpose of this method is to "tap into"
-     * a method chain in order to perform operations on intermediate results within
-     * the chain.
+     * This method invokes `interceptor` and returns `value`. The interceptor
+     * is invoked with one argument; (value). The purpose of this method is to
+     * "tap into" a method chain in order to modify intermediate results.
      *
      * @static
      * @memberOf _
@@ -7074,6 +7073,7 @@
      *
      * _([1, 2, 3])
      *  .tap(function(array) {
+     *    // Mutate input array.
      *    array.pop();
      *  })
      *  .reverse()
@@ -7087,6 +7087,8 @@
 
     /**
      * This method is like `_.tap` except that it returns the result of `interceptor`.
+     * The purpose of this method is to "pass thru" values replacing intermediate
+     * results in a method chain.
      *
      * @static
      * @memberOf _