tools: enforce consistent operator linebreak style

Adds the `operator-linebreak` rule to our ESLint config.

PR-URL: #10178
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Roman Reiss <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Jeremiah Senkpiel <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Teddy Katz <[email protected]>
Reviewed-By: Sakthipriyan Vairamani <[email protected]>

Author: targos

.eslintrc

@@ -65,6 +65,7 @@ rules:
   no-mixed-spaces-and-tabs: 2
   no-multiple-empty-lines: [2, {max: 2}]
   no-trailing-spaces: 2
+  operator-linebreak: [2, after, {overrides: {'?': ignore, ':': ignore}}]
   quotes: [2, "single", "avoid-escape"]
   semi: 2
   space-before-blocks: [2, "always"]