Suggested-by: Brand Huntsman <alpha@qzx.com>

So the result could be used during RC-file reading.

Also drop an old debugging fragment.

There shouldn't be two separate variables (but with the same name) that
count the number of digits seen.  Fuse them into a single static var.

This fixes https://savannah.gnu.org/bugs/?52863.

Use the same method as in parse_verbatim_kbinput() for Unicode input.

Also, when replacing forwards, do not first skip the occurrence at the
cursor and then replace it at the end of the cycle, but begin with it,
as one would expect.

This fixes https://savannah.gnu.org/bugs/?52789
and fixes https://savannah.gnu.org/bugs/?52791.

These three functions are needed only when both linter and speller
are available.

This fixes https://savannah.gnu.org/bugs/?52834.
Reported-by: <akiko@mailbox.org>

If help is enabled, those functions should be described too,
and if nanorc is enabled, they should both be rebindable.

Each leading tab is converted to two tabs, and any leading four spaces
is converted to one tab.  The intended tab size (for keeping most lines
within 80 columns) is now four.

This fixes https://savannah.gnu.org/bugs/?52755

.
Reported-by: Brand Huntsman <alpha@qzx.com>

When unindenting/uncommenting affected the bottom line of the marked
region, keep affecting this line also during subsequent consecutive
indenting/commenting.

This fixes https://savannah.gnu.org/bugs/?52718.

So that Commenting comes closer to the somewhat related Indenting
and Unindenting functions.

Also, make the descriptions for indenting/unindenting more precise.

So they will be found quicker.

Also fold two assignments into one.

They were mistakenly added by changeset fb85c055, four commits ago.

This fixes https://savannah.gnu.org/bugs/?52717.

Suggested-by: Brand Huntsman <alpha@qzx.com>

If the marked region ends at the start of a line, do not include that
line in the indenting/undenting or commenting/uncommenting.  This is
closer to what the eye would expect.

Unset the "Modified" marker only at the point where the file was last
saved -- if there is such a point, because it can be missing when the
undo stack was discarded.

This fixes https://savannah.gnu.org/bugs/?52689

.
Reported-by: Liu Hao <lh_mouse@126.com>
Original-idea-by: Brand Huntsman <alpha@qzx.com>