This fixes https://savannah.gnu.org/bugs/?53317

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Reported-by: David Lawrence Ramsey <pooka109@gmail.com>

This assumes that all movement functions are located together,
starting with to_first_line() and ending with do_right().

This fixes https://savannah.gnu.org/bugs/?53195

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

The implant() function itself cannot be bound to anything, so it
is not in the linked list of functions -- trying to find it would
lead to a NULL pointer, and thus to a segfault.

This fixes https://savannah.gnu.org/bugs/?53233.

Instead of always calling sctofunc(), it is now only called when
in view mode OR when (after the keystroke's function has been run)
no need for a refresh has been established yet.

Exclude the confusing, pleonastic 'sc' abbreviation from their names.

The new option 'set errorcolor' allows the user to specify the color
combination for the status bar when an error message is displayed.

When 'refresh_needed' is already TRUE, there is no need any more
to check whether it should be set.

[Those first two calls are leftovers from before the time that
reset_multis() morphed into check_the_multis().]

When characters are added via Verbatim Input or by pressing <Tab>,
the prepend flag should be retained, just like when characters are
typed directly.

This fixes https://savannah.gnu.org/bugs/?52956.

Suggested-by: Mike Frysinger <vapier@gentoo.org>

This addresses https://savannah.gnu.org/bugs/?48992.

In this way a single keystroke can produce a fragment of text or a
series of commands, or a mix of the two.  It is like a prerecorded
macro.

This fulfills https://savannah.gnu.org/bugs/?52931.

And one for me, for the much changed keyboard stuff.

Also, actually add the long option --trimblanks to the table.

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

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

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.

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.

This fixes https://savannah.gnu.org/bugs/?52651

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Reported-by: David Lawrence Ramsey <pooka109@gmail.com>

The function get_keycode() should never return zero -- it should
return either the code from ncurses or the given fallback code.

This fixes https://savannah.gnu.org/bugs/?52682.

In this way we can delete things on the current line with ^K (after
Shift-selecting some text) without nano misdetecting a line change,

This fully fixes https://savannah.gnu.org/bugs/?52576.

Only when the cursor has moved off of the currrent line do we stop
prepending wrapped words to the next line.

This partially fixes https://savannah.gnu.org/bugs/?52576.

To get rid of two double negatives.

This fixes http://savannah.gnu.org/bugs/?52523.

When some or all edits have been undone, and the user starts to make
new edits, the old part of the undo stack is discarded, but this does
not mean that the undo stack doesn't go back to the very beginning.

This really fixes https://savannah.gnu.org/bugs/?52504.

The softmark is now only cancelled when the cursor is moved without
Shift being held, not for things like ^L (Refresh), ^C (Position),
or ^G (Help).

This addresses https://savannah.gnu.org/bugs/?52470.