[doc] Fix erroneous backslashes in signatures and names (GH-23658)
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.
diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst
index 7f947ef..4ac3f80 100644
--- a/Doc/library/subprocess.rst
+++ b/Doc/library/subprocess.rst
@@ -339,7 +339,7 @@
stderr=None, preexec_fn=None, close_fds=True, shell=False, \
cwd=None, env=None, universal_newlines=None, \
startupinfo=None, creationflags=0, restore_signals=True, \
- start_new_session=False, pass_fds=(), \*, group=None, \
+ start_new_session=False, pass_fds=(), *, group=None, \
extra_groups=None, user=None, umask=-1, \
encoding=None, errors=None, text=None, pipesize=-1)