action/command: Allow `-vsplit` & `-hsplit` as optional argument for `help`
Additionally the help, vsplit and hsplit command can now open multiple files like the tab command.
Restore the original meaning of LastVisualX before commit 6d13710d93
("Implement moving cursor up/down within a wrapped line"): last visual x
location of the cursor in a logical line in the buffer, not in a visual
line on the screen (in other words, taking tabs and wide characters into
account, but not taking softwrap into account). And add a separate
LastWrappedVisualX field, similar to LastVisualX but taking softwrap
into account as well.
This allows tracking last x position at the same time for both cases
when we care about softwrap and when we don't care about it. This can be
useful, for example, for implementing cursor up/down movement actions
that always move by logical lines, not by visual lines, even if softwrap
is enabled (in addition to our default CursorUp and CursorDown actions
that move by visual lines).
Also this fixes a minor bug: in InsertTab(), when `tabstospaces` is
enabled and we insert a tab, the amount of inserted spaces depends on
the visual line wrapping (i.e. on the window width), which is probably
not a good idea.
Since we already have the StoreVisualX() helper, use it all over the
place instead of setting LastVisualX directly.
This will allow us to add more logic to StoreVisualX() add let this
extra logic apply everywhere automatically.
In rust, there are some prefixes that may be part of the string literal.
String literals of the form b"test" (and br##"test"## etc) are byte
strings (as opposed to unicode strings), and similarly, string literals
of the form c"test" are C zero-terminated strings. Hence, added optional
prefixes to each of the string regular expressions so the prefix will be
recognized as part of the string.
Built and tested after fix.
Co-authored-by: James Corey <jc-git@neniam.net>
Update from PR feedback:
Coalesce multiple statement rules into one.
Coalesce multiple constant.number into one.
Update from more PR feedback:
Fix special variables (starting with $)--var must start with $,
i.e. x$y is not a valid special var, but you can have x=$y.
Compiled and tested again with latest changes.
Co-authored-by: James Corey <jc-git@neniam.net>
