[3.8] [doc] Fix erroneous backslashes in signatures and names (GH-23658)

[andresdelfino]

The issue being resolved is shown in the 3.10 docs (if you select docs for older versions you won't see a visual glitch).

The newer sphinx version that produces the 3.10 docs doesn't treat the backslash to escape things in some situations it previously did..
(cherry picked from commit dcc997c)

Co-authored-by: Andre Delfino adelfino@gmail.com

Automerge-Triggered-By: GH:Mariatta

[andresdelfino]

@Mariatta perhaps we can merge this?

[ghost]

LGTM

[Mariatta]

Thanks

[JulienPalard]

As in the 3.8 and 3.9 branch we don't use the newer Sphinx, this commit drops the backslashes :( I think this should be reverted, are you ok for a revert @andresdelfino ?

[andresdelfino]

@JulienPalard this commit doesn't affect how the doc is rendered for 3.8/3.9, but I think it's good to have consistency with master (to prevent conflicts for future commits).

[JulienPalard]

@andresdelfino I just tried locally a first build on the top of 3.9, I have:

print(*objects, sep=' ', end='n', file=sys.stdout, flush=False) 

and then reverted e89993c, build again, and I now have:

print(*objects, sep=' ', end='\n', file=sys.stdout, flush=False) 

so looks like e89993c made the backslash dissapear (see here in prod: https://docs.python.org/3.9/library/functions.html#print)

[andresdelfino]

@JulienPalard oh, yes, you are right; this should be reverted. Sorry!