Fix JSHint errors

X-Ref: https://github.com/twbs/bootstrap/commit/8c9739d4773c268b114296d90e61b5f4e2932517
relative not absolute
Add missing blank line
Merge pull request #13081 from ZDroid/blank

Add missing blank line
Update dependencies.
Merge branch 'master' of github.com:twbs/bootstrap
Fixes #13055: Mention outdenting more