Fix docstring Args entries that name a parameter the function does not take - #8995

Fourteen Args: entries name a parameter the function does not take. Docstrings only.

Seven renames:

The last one had two entries where the signature has one: start/end are from a version that took a range.

The rest document an argument that is gone: count in _tab_close (the helper does not take it — the tab-close command does), aliases in _get_alias, idx in _update_window_title, and pages, cmdhist and exc in _gather_crash_info, which takes only self.

I left two groups alone, since both look like house convention rather than mistakes:

• Class docstrings that list attributes under Args: — GUIProcess, SocketError, ListenError, LineParser, NeighborList. Their __init__ arguments are documented separately in the constructor.
• The count entries on the @cmdutils.register commands in misccommands.py. count is the argument the command takes; cmdutils.Value.count_tab turns it into tab before the Python function sees it, and the command help is built from that docstring.

Everything here was opened and read against the code first.