Also fix a URL that mistaken points to a specific bug.

Apparently the curses on SunOS is less forgiving than the one on GNU.
Or rather: delwin(NULL) should just return an error, it shouldn't crash.

This fixes https://savannah.gnu.org/bugs/?51053

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Reported-by: John Wiersba <jrw32982@yahoo.com>
Solved-by: John Wiersba <jrw32982@yahoo.com>

Most of the keywords listed on the following URL are now highlighted:
  http://php.net/manual/en/reserved.keywords.php

Also color single-quoted strings, and require that //-type comments
are preceded by whitespace or are alone on a line.

With-feedback-from: M <taur@mail.com>

This fixes https://savannah.gnu.org/bugs/?50972

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Reported-by: John Wiersba <jrw32982@yahoo.com>

It's useless, because the position doesn't get restored, and it
cannot be restored because the name is different every time.

This extra question was included upon Chris' request, but I find it
confusing and angering.

(And in the bargain sort or group some of the keywords.)

This addresses https://savannah.gnu.org/patch/?9342

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Suggested-by: M <taur@mail.com>

When spotlighting the string to be replaced, placewewant isn't valid,
so tell place_the_cursor() to ignore its value to avoid the cursor
getting mistakenly placed at the beginning of the next row.

This fixes https://savannah.gnu.org/bugs/?50997

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

When the column given in gotoline() is beyond the last available
column in the row of the last chunk, then set placewewant to the
actual end of the chunk, to prevent surprising jumps to the left
when moving up or down from there.

This fixes https://savannah.gnu.org/bugs/?50995.

Whenever 'make' is run, it should check whether the revision has
changed, and if so, it should update src/revision.h.

This portable FORCE mechanism should have been the replacement for
the phony target that was removed in a33a4f00, five commits ago.

This fixes https://savannah.gnu.org/bugs/?50956 in a better way.

Also, allow rebinding the word and block jumping functions
in the tiny version when nanorc files are reenabled.

(This should have been part of 9ea5eef2, four commits ago.)

Also, allow Ctrl+Left/Right with --enable-tiny --enable-browser.

This fixes https://savannah.gnu.org/bugs/?50956

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Reported-by: John Wiersba <jrw32982@yahoo.com>

Also remove a superfluous check for 'do_replace' -- it never gets
bound in the Search/Replace menus.

When configured with --enable-tiny --enable-multibuffer,
/do/ include the new-buffer toggle in the Read-File menu.

Some .rdf files are XML, but the .rdf extension seems to be used
also for other things.  So... use the 'header' mechanism.

(Hadn't seen that one because of my additional bindings.)

Add missing spaces, remove excess spaces, and
replace groups of indentation spaces with tabs.

When not in a UTF-8 locale, each character is just a single byte.

Instead of always stepping back four bytes and then tentatively
moving forward again (which is wasteful when most codes are just
one or two bytes long), inspect the preceding bytes one by one
and begin the move forward at the first valid starter byte.

This reduces the backwards searching time by close to 40 percent.

This reduces the backwards searching time by a good 20 percent.

Also when toggling the help lines back on or the extra editing space
back off, keep the cursor near the bottom of the screen if it /was/
there, instead of centering it -- if smooth scrolling is on, that is.

This supplements the fix for https://savannah.gnu.org/bugs/?50933.

When the editing space gets narrower, either by toggling line numbers on
or making nano's window smaller, and when the cursor is near the bottom,
it can be pushed offscreen.  In that case, don't get it back onscreen by
centering the current line but by putting it on the bottom row.  This
makes for a smoother experience.

This fixes http://savannah.gnu.org/bugs/?50933.

And hide the cursor again as soon as the user scrolls.
Achieve this through making the 'didfind' variable global.

Also, remove a superfluous call of wnoutrefresh(), as bottombars()
already does that.

This fixes https://savannah.gnu.org/bugs/?50918

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