Add multiple brackets injection, tweaks
Add multiple brackets injection, tweaks

Change injectTag parameters order to make more sense.
Inject text into el.
Add parent parameter in testForBrackets to avoid unceserray DOM search.

Rename variables to convey more information.
Disable eslint rule for the file because it complained about
HTML reassigns.

mrv1k/bracketless,mrv1k/bracketless