Dedup->dedupe->deduplicate

[peternewman]

See also notes in #1602

[larsoner]

Travis is not happy

[sebweb3r]

Travis will never be happy with that. Informal requires both error and replacement to be in aspell. None of the three words is in aspell.
http://app.aspell.net/lookup?dict=en_US;words=dedup%0D%0Adedupe%0D%0Adeduplicate

[larsoner]

Travis will never be happy with that. Informal requires both error and replacement to be in aspell. None of the three words is in aspell.

Travis will do whatever we say :) Concretely, I'm fine with modifying the test suite to have exceptions (# do not check aspell for this set of words) in cases like these if it's justified to do so

[sebweb3r]

Ok, let me rephrase it. Without bending travis, it won't accept it.

This basically follows this trend:
#1711

[lurch]

I suspect these commits need squashing? 😉

[bl-ue]

@peternewman can I merge this PR? (SQUASH definitely!!)

[DimitriPapadopoulos]

@peternewman It should be possible to merge this pull request if you resolve the conflicts and put words missing from aspell under codespell_lib/tests/data.