Consistent parens usage for arrow functions with body.

.eslintrc.js

@@ -38,6 +38,10 @@ module.exports = {
       'requireReturnForObjectLiteral': false
     }],
 
+    'arrow-parens': ['error', 'as-needed', {
+      'requireForBlockBody': true
+    }],
+
     'arrow-spacing': ['error', {
       'before': true,
       'after': true

.internal/baseMatchesProperty.js

@@ -22,7 +22,7 @@ function baseMatchesProperty(path, srcValue) {
   if (isKey(path) && isStrictComparable(srcValue)) {
     return matchesStrictComparable(toKey(path), srcValue)
   }
-  return object => {
+  return (object) => {
     const objValue = get(object, path)
     return (objValue === undefined && objValue === srcValue)
       ? hasIn(object, path)

.internal/createCaseFirst.js

@@ -11,7 +11,7 @@ import toString from '../toString.js'
  * @returns {Function} Returns the new case function.
  */
 function createCaseFirst(methodName) {
-  return string => {
+  return (string) => {
     string = toString(string)
 
     const strSymbols = hasUnicode(string)

.internal/getSymbols.js

@@ -13,7 +13,7 @@ const nativeGetSymbols = Object.getOwnPropertySymbols
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of symbols.
  */
-const getSymbols = !nativeGetSymbols ? () => [] : object => {
+const getSymbols = !nativeGetSymbols ? () => [] : (object) => {
   if (object == null) {
     return []
   }

.internal/getSymbolsIn.js

@@ -10,7 +10,7 @@ const nativeGetSymbols = Object.getOwnPropertySymbols
  * @param {Object} object The object to query.
  * @returns {Array} Returns the array of symbols.
  */
-const getSymbolsIn = !nativeGetSymbols ? () => [] : object => {
+const getSymbolsIn = !nativeGetSymbols ? () => [] : (object) => {
   const result = []
   while (object) {
     result.push(...getSymbols(object))

.internal/getTag.js

@@ -31,7 +31,7 @@ if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
     (getTag(Promise.resolve()) != promiseTag) ||
     (getTag(new Set) != setTag) ||
     (getTag(new WeakMap) != weakMapTag)) {
-  getTag = value => {
+  getTag = (value) => {
     const result = baseGetTag(value)
     const Ctor = result == objectTag ? value.constructor : undefined
     const ctorString = Ctor ? toSource(Ctor) : ''

.internal/matchesStrictComparable.js

@@ -8,7 +8,7 @@
  * @returns {Function} Returns the new spec function.
  */
 function matchesStrictComparable(key, srcValue) {
-  return object => {
+  return (object) => {
     if (object == null) {
       return false
     }

.internal/memoizeCapped.js

@@ -12,7 +12,7 @@ const MAX_MEMOIZE_SIZE = 500
  * @returns {Function} Returns the new memoized function.
  */
 function memoizeCapped(func) {
-  const result = memoize(func, key => {
+  const result = memoize(func, (key) => {
     const { cache } = result
     if (cache.size === MAX_MEMOIZE_SIZE) {
       cache.clear()

.internal/setToArray.js

@@ -9,7 +9,7 @@ function setToArray(set) {
   let index = -1
   const result = Array(set.size)
 
-  set.forEach(value => {
+  set.forEach((value) => {
     result[++index] = value
   })
   return result

.internal/stringToPath.js

@@ -23,7 +23,7 @@ const rePropName = RegExp(
  * @param {string} string The string to convert.
  * @returns {Array} Returns the property path array.
  */
-const stringToPath = memoizeCapped(string => {
+const stringToPath = memoizeCapped((string) => {
   const result = []
   if (reLeadingDot.test(string)) {
     result.push('')

cond.js

@@ -30,7 +30,7 @@ import arrayMap from './.internal/arrayMap.js'
 function cond(pairs) {
   const length = pairs == null ? 0 : pairs.length
 
-  pairs = !length ? [] : arrayMap(pairs, pair => {
+  pairs = !length ? [] : arrayMap(pairs, (pair) => {
     if (typeof pair[1] != 'function') {
       throw new TypeError('Expected a function')
     }

toString.js

@@ -37,7 +37,7 @@ function toString(value) {
   }
   if (Array.isArray(value)) {
     // Recursively convert values (susceptible to call stack limits).
-    return `${ arrayMap(value, (other) => other == null ? other : toString(other)) }`
+    return `${ arrayMap(value, other => other == null ? other : toString(other)) }`
   }
   if (isSymbol(value)) {
     return symbolToString ? symbolToString.call(value) : ''

unzip.js

@@ -30,7 +30,7 @@ function unzip(array) {
     return []
   }
   let length = 0
-  array = arrayFilter(array, group => {
+  array = arrayFilter(array, (group) => {
     if (isArrayLikeObject(group)) {
       length = nativeMax(group.length, length)
       return true