[MERGE][0.16] temp file for commit message in external editor should be opened in text mode (#110901)

[Alexander Belchenko]

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John Arbash Meinel пишет:
> John Arbash Meinel has voted -0.
> Status is now: Approved
> Comment:
> Please wait before merging.
> I don't have time to do a full review but there is some cruft in the tests.
> 
> v-- This is really ugly, and we should find a better way to wrap the lines.
> 
> +        msgfilename, hasinfo = bzrlib.\
> +                               msgeditor.\
> +                               _create_temp_file_with_commit_template(
> +                                    'infotext', '----', 'start message')

It's for keep lines shorter than 80 chars.
If you say it's ugly...
I could use shorter variable names, and shorter name for function
under test.
And importing

from bzrlib import msgeditor

it's also shorten a bit.


[µ]
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