resolve all no-trailing-spaces eslint violations

app/assets/javascripts/protected_branches/protected_branch_edit.js.es6

-/* eslint-disable no-new, arrow-parens, no-param-reassign, comma-dangle, no-trailing-spaces, max-len */
+/* eslint-disable no-new, arrow-parens, no-param-reassign, comma-dangle, max-len */
 /* global Flash */
 (global => {

spec/javascripts/issue_spec.js

-/* eslint-disable space-before-function-paren, no-var, one-var, one-var-declaration-per-line, no-use-before-define, indent, no-trailing-spaces, comma-dangle, max-len */
+/* eslint-disable space-before-function-paren, no-var, one-var, one-var-declaration-per-line, no-use-before-define, indent, comma-dangle, max-len */
 /* global Issue */
 /*= require lib/utils/text_utility */