rn-126: minor copy edit

[stepnem]

Two changes which might warrant explanation:

1. 'misguided thoughts' is the title of Sean Gillespie's
   blog, but its lowercase spelling gives opportunity for the
   sentence to be misunderstood as editorial
   commentary (unlikely, granted, but gives the reader
   unnecessary pause); another option I considered was adding
   quotes or linkification, but saying just "on his blog" seems
   perfectly sufficient and clear.

2. Add quotes around a part of the git-tools description to
   indicate that "help you make crazy stuff in a very unsafe
   way" is a direct quote of the tool author's description.
   Otherwise I feel that this, too, will give the reader pause,
   as it provides almost no information, in contrast with what
   we usually try to achieve with descriptions.

[chriscool]

Looks great to me, thanks @stepnem!