py3: use r'' to prevent the addition of b'' by transformer
There are cases in opts handling in debugcommands.py where we don't need to
convert opts keys back to bytes as there are some handful cases and no other
function using opts value. Using r'', we prevent the transformer to add
a b'' which will keep the value str.
lib - sys sys
mercurial - sys sys
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9diff - sys sys
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lib - sys sys
python - sys sys
lib - sys sys
python2.5 - sys sys
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hgext - sys sys
+ - sys sys
mercurial - sys sys
+ - sys sys
mercurial-VERSION-py2.5.egg-info - sys sys
src - sys sys
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+ - sys sys