Fix ESLint docs errors. (#23163)

Ignore ESLint error in ie-emulation-modes-warning.js.

Although the error is valid, enough time has been spent on old IE's problems, so just ignore it.

js/.eslintrc.json

@@ -58,6 +58,7 @@
       }
     ],
     "no-multi-spaces": ["error", {
+      "ignoreEOLComments": true,
       "exceptions": {
         "AssignmentExpression": true,
         "ArrowFunctionExpression": true,