Fix tests and style

jest/customMatchers.js

@@ -6,17 +6,16 @@ expect.extend({
       return str.replace(/\s/g, '')
     }
 
-    if (stripped(received) == stripped(argument)) {
+    if (stripped(received) === stripped(argument)) {
       return {
-        message: () =>
-          `expected ${received} not to match CSS ${argument}`,
+        message: () => `expected ${received} not to match CSS ${argument}`,
         pass: true,
-      };
+      }
     } else {
       return {
         message: () => `expected ${received} to match CSS ${argument}`,
         pass: false,
-      };
+      }
     }
-  }
+  },
 })

src/lib/substituteHoverableAtRules.js

@@ -1,5 +1,3 @@
-import cloneNodes from '../util/cloneNodes'
-
 export default function() {
   return function(css) {
     css.walkAtRules('hoverable', atRule => {

src/lib/substituteVariantsAtRules.js

@@ -2,23 +2,23 @@ import _ from 'lodash'
 import postcss from 'postcss'
 
 const variantGenerators = {
-  hover: (rule) => {
-    const clonedRule = rule.clone()
+  hover: container => {
+    const cloned = container.clone()
 
-    clonedRule.walkRules(rule => {
+    cloned.walkRules(rule => {
       rule.selector = `.hover\\:${rule.selector.slice(1)}:hover`
     })
 
-    return clonedRule.nodes
+    return cloned.nodes
   },
-  focus: (rule) => {
-    const clonedRule = rule.clone()
+  focus: container => {
+    const cloned = container.clone()
 
-    clonedRule.walkRules(rule => {
+    cloned.walkRules(rule => {
       rule.selector = `.focus\\:${rule.selector.slice(1)}:focus`
     })
 
-    return clonedRule.nodes
+    return cloned.nodes
   },
 }
 
@@ -29,7 +29,7 @@ export default function() {
 
       atRule.before(atRule.clone().nodes)
 
-      _.forEach(['focus', 'hover'], (variant) => {
+      _.forEach(['focus', 'hover'], variant => {
         if (variants.includes(variant)) {
           atRule.before(variantGenerators[variant](atRule))
         }