Bug 1271084 - Apply ESLint autofixes to ignored /devtools files. r=tromey

For simple rules like function spacing, we can auto-fix these across the code
base so they are followed in a consistent way.

To generate this patch, I ran:

./mach eslint devtools --no-ignore --fix

After this, I reverted any changes to third party files that we really do want
to ignore.

MozReview-Commit-ID: 6Q8BApkAW20

devtools/client/webconsole/new-console-output/components/console-output.js

@@ -42,7 +42,7 @@ const ConsoleOutput = createClass({
   },
 
   render() {
-    let messageNodes = this.props.messages.map(function(message) {
+    let messageNodes = this.props.messages.map(function (message) {
       return (
         MessageContainer({ message })
       );