Replace \* with \\* in docstrings

[ashwin153]

For example,

https://github.com/jek/blinker/blob/b5e9f0629200d2b2f62e13e595b802948bb4fefb/blinker/base.py#L250

Causes the following deprecation warning.

DeprecationWarning: invalid escape sequence \*

Here's a reproduction.

import warnings
warnings.simplefilter("always")
x = "\*\*kwargs"
# <stdin>:1: DeprecationWarning: invalid escape sequence \*

Instead, the \* should be replaced by \\*. The following does not raise a DeprecationWarning.

import warnings
warnings.simplefilter("always")
x = "\\*\\*kwargs"

Not a huge deal, but these warnings pollute my build logs.

[blacklight]

Can this PR please be merged? On Python 3.6 this is actually a breaking SyntaxError:

/usr/lib/python3.6/site-packages/flask/signals.py:13: in <module>
    from blinker import Namespace
/usr/lib/python3.6/site-packages/blinker/__init__.py:1: in <module>
    from blinker.base import (
E     File "/usr/lib/python3.6/site-packages/blinker/base.py", line 110
E       """
E        ^
E   SyntaxError: invalid escape sequence \*

[ashwin153]

@yackx

[yackx]

Sorry @ashwin153 I am actually not involved in the project. @jek Can you please remove me from the contributor's list?

[juliangilbey]

This was fixed by 194e17a on 28 Oct 2020 by making the strings raw strings. Were you getting the deprecation warning even with the current master version?

[ashwin153]

Oh maybe it's already fixed. Would it be possible to do a release?

[davidism]

Fixed by #63, although both of these should have used ReST code markup instead.

``kwargs``