considering incorporating the BRACKET jumps into the same function, so I
wanted to establish a rollback point.

non-list elements crossing list boundaries) are basically working.
Checking in work before beginning on documentation and cleanup.

Just realized there's a good use-case for visual mode versions of these
commands. Establishing a rollback point before implementing...

flow commands need cursor to remain on near side of element when visual
mode is re-activated, added an optional arg to select_current_marks(),
which allows desired cursor position (which obviously must correspond to
one of the visual marks) to be specified. Need to clean up and document.
Also need to add visual mode support for the element flow commands.

whether to modify logic to use end of visual selection in desired
direction as start of search. Currently, I use cursor position
unconditionally, but it occurs to me that if a single element is
selected, it's likely the user would want the jump to move to a
different element, not just a different side of the current one.

the documentation. Did a bit of cleanup and commenting in the source
file, but more is needed...

list flow commands to note the distinction between in/out flow. Began
(but didn't finish) updating the documentation. Also, changed "element"
to "nonlist" in what were previously known as "element flow" commands,
to reflect the fact that a list can't be a target of a non-list flow
command (though a list can be an element in normal vim-sexp parlance).

naming changes, but wanted to backup.

documentation to reflect the changes. A bit more cleanup needed, but
wanted to establish rollback point before picking one of the alternate
presentations of the list flow command documentation.

bit more rework to handle character literals and comments properly.

however, I'm thinking of going to a simpler fix, which is more robust,
albeit possibly a bit less efficient.

pull request.

was added to handle some edge cases that aren't handled any where else
in vim-sexp.

Reworked handling of BOF/EOF for list_flow to make more consistent with
the philosophy of accepting whatever we find as target: e.g., I now
select the list corresponding to the final bracket of desired type, even
if cursor started on it. Also, fixed bug whereby only parens were
treated as brackets.
--leaf_flow--
Simplified logic significantly after deciding not to handle (admittedly
somewhat pathological) edge cases that the rest of vim-sexp doesn't
handle. Commented the rationale in the function header.
--Cleanup--
Final review and commenting of flow functions (both list and leaf).
Removed alternate (but now dead) implementations of leaf_flow.

should have been used.