Fixed some escape sequence in strings. (#13340)
Summary of the issue:
NVDA code base has some erroneous strings containing backslash:
Running NVDA from source, you can get the following warning:
DEBUGWARNING - Python warning (23:25:35.885) - MainThread (9764):
C:\Users\CB232690\Documents\DevP\GIT\nvda\source\api.py:460: DeprecationWarning: invalid escape sequence \|
some functions have docstring containing a backslash where it should be two of them (or a raw string)
Testing strategy:
For W605 error: copy / paste the modified string before and after in the console and checked their equality, e.g.:
>>> a = u'^((?P<sheet>(\'[^\']+\'|[^!]+))!)?'
>>> b = r"^((?P<sheet>('[^']+'|[^!]+))!)?"
>>> a == b
Checked manually the modified docstrings in the console:
>>> import addonHandler
>>> help(addonHandler.Addon.getDocFilePath)
>>> help(addonHandler._ge
