env(perl) Much improved regex detection

.eslintrc.js

@@ -29,7 +29,11 @@ module.exports = {
     // for now ignore diff between types of quoting
     quotes: "off",
     // this is the style we are already using
-    "operator-linebreak": ["error", "before", { overrides: { "=": "after", "?": "after", ":": "after", "+": "after" } }],
+    "operator-linebreak": ["error", "before", { overrides: {
+      "=": "after",
+      "+": "after"
+    }
+    }],
     // sometimes we declare variables with extra spacing
     indent: ["error", 2, { VariableDeclarator: 2 }],
     // seems like a good idea not to use explicit undefined

CHANGES.md

@@ -6,6 +6,7 @@ New Languages:
 
 Language grammar improvements:
 
+- env(perl) Much improved regex detection (#2960) [Josh Goebel][]
 - enh(swift) Improved highlighting for operator and precedencegroup declarations. (#2938) [Steven Van Impe][]
 - fix(xml) Support single-character namespaces. (#2957) [Jan Pilzer][]
 

src/highlight.js

@@ -118,9 +118,9 @@ const HLJS = function(hljs) {
 
     // a before plugin can usurp the result completely by providing it's own
     // in which case we don't even need to call highlight
-    const result = context.result ?
-      context.result :
-      _highlight(context.language, context.code, ignoreIllegals, continuation);
+    const result = context.result
+      ? context.result
+      : _highlight(context.language, context.code, ignoreIllegals, continuation);
 
     result.code = context.code;
     // the plugin can change anything in result to suite it