corrects IRC room
escaped uri
fix typo in CONTRIBUTING.md
Update Wall of Browser Bugs entry for #14972

http://crbug.com/429604 has been merged into http://crbug.com/175502
Document Savage cross-browser JS pull request tester bot

Refs #12352, which is now implemented & deployed.
More info: https://github.com/twbs/savage

[skip sauce]
Merge pull request #15187 from twbs/doc-savage-contributing

Document Savage cross-browser JS pull request tester bot
[skip sauce]
fix affix-top unit test to properly clean up after itself
Fix #15194: Shrink media link area
add Apple Safari Radar entry for #8350
add documenting in MDN as a step in browser bug handling process

[skip sauce]
[skip validator]
Merge pull request #15200 from twbs/mdn

add documenting in MDN as a step in browser bug handling process
Merge pull request #15198 from twbs/fix-15194

Fix #15194: Shrink media link area
Run `grunt`.
Merge pull request #15108 from zacechola/irc_room

corrects IRC room
775 to 644