Summary:
Adds a secret, undoucmented "encoding" key to ".arcconfig" which makes a very
half-hearted effort to convert encodings. This is probably good enough that
Differential can be used for code review, but there will be issues with 'arc
patch', 'arc export', paste, maybe conduit stuff, Diffusion, and whatever else I
haven't thought of.
This also doesn't store the original encoding so anything converted like this
won't reasonably be able to be made to work with all that stuff in the future.
See T452 for a broader discussion of the issues involved.
Test Plan:
Short circuited the UTF-8 detection to always fail, had my files "converted"
from ISO-8859-1 to UTF-8.
@davidreuss: you can test this by applying this patch to arcanist/, adding
'"encoding" : "ISO-8859-1"' to your .arcconfig, touching some non-ASCII file,
and then running "arc diff".
Reviewers: davidreuss, jungejason, tuomaspelkonen, aran
Reviewed By: davidreuss
CC: aran, davidreuss, epriestley, nshamg123
Differential Revision: 812
