A qualifying clause beginning with words like "as", "if", or "although" should have a comma separating it from any following clauses in a sentence, but should not have a comma immediately after the beginning word, unless it is to separate a third, non-essential clause.  

Example 1: "Although I would quite like to go to lunch with you, I find myself instead writing a detailed commit message to justify a single-character documentation change."

Example 2: "Despite, as you might well imagine, wishing I hadn't even noticed it in the first place, I still felt the error was worth correcting."

Fix NumberHelper options wrapping to prevent verbatim blocks being rendered instead of line continuations.  While I'm at it, wrap long comment lines consistently.

Adding test for humans.txt

add humans.txt

Allow explicitly set content-type via head method when status code allows it according to the RFCs

Add failing test re #3436 which demonstrates content_type is not respected when using the :head method/shortcut

Removed ActiveSupport#load_all!

Fix guides for as core ext

This reverts commit c962680e.

Reason: The links must be relative to work in both edge and stable api
sites.

Revert "Compressed all images from the guide through ImageOptim which saves sometimes up to 74.6% in size [ci skip]"

Reason: this change can't really be done in docrails,
see http://weblog.rubyonrails.org/2012/3/7/what-is-docrails/

This reverts commit bc06e8d7.

Locking ruby-prof for now. 

Minor test improvement

Compressed all images from the guide through ImageOptim which saves sometimes up to 74.6% in size [ci skip]

Change unless + else into if + else

Need to investigate why build is failing because of 
ruby-prof.