Fixes a pathological situation where if a function signature used a trailing
comma but was later reformatted to a single line (with the trailing comma
removed), Black would change its mind whether a file is Python
3.6-compatible between runs.
Just executing ``black`` without any argument does not print any message
to stdout or stderr. It's rather confusing, because the user doesn't
know what happened.
In ``len(sources) == 0`` case, black now prints ``No paths given. Nothing to
do``.
Signed-off-by: Christian Heimes <christian@python.org>
Black will cache already formatted files using their file size and
modification timestamp. The cache is per-user and will always be used
unless Black is used with --diff or with code provided via standard
input.
This support isn't *exactly* right per PEP 3131 as the regex engine is a bit
too limited for that and I didn't want to spend time on Other_ID_Start and
Other_ID_Continue unless they're actually needed.
Hopefully this doesn't slow it down too much.
In raw strings, a single backslash means a literal backslash. It is also used to escape quotes if it precedes them. This means it is impossible to change the quote type for strings that contain an unescaped version of the other quote type.
Fixes#100
Black cannot currently support this form due to its generator-based nature.
This is mostly a problem for existing `# yapf: disable` usage as trailing
comment.
Fixes#95
The default behaviour is that now all lines break *before* delimiters,
instead of afterwards. The special cases for this are commas and
behaviour around args.
Resolves#73
* Normalize string quotes
Convert single-quoted strings to double-quoted. Convert triple single-quoted strings to triple double-quoted. Do not touch any strings where conversion would increase the number of backslashes.
Fixes#51.
* reformat Black itself
Now Black properly splits standalone comments within bracketed expressions.
They are treated as another type of split instead of being bolted on with
whitespace prefixes.
A related fix: now multiple comments might appear after a given leaf.
Fixes#22
