Remove broken link to Customizing Bootstrap
fix typo in css - buttons
Merge pull request #13901 from knownasilya/typo

Fix typo in css - buttons docs
Use @font-size-small variable to calculate <small> font-size fixes #13713 #13809
Fixes #13903: Restore side padding on .btn-block
Merge branch 'master' of github.com:twbs/bootstrap
grid class inconsistency /cc @juthilo
Merge pull request #13900 from twbs/customize_on_your_own

Remove broken link
Merge pull request #13882 from thomaswelton/issue-13713-use-variable-small

Use @font-size-small variable to calculate <small> font-size
grid class inconsistency 2

https://github.com/twbs/bootstrap/commit/32bde78e1996a92e6b801e1f4a475d5ab48685f8