allocating enough space for COLS characters


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character's a tab, which can be possible if there are enough tabs and
the terminal size is sufficiently large, don't try to display it using
control_mbrep()


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a few tweaks


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fixes


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FFFF instead of xxxE and xxxF, and discard hexadecimal D800 to DFFF as
well, as they're also invalid Unicode characters


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related variables


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of FFFF, as FFFE and FFFF are invalid Unicode characters


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functions' append parameter an enum instead of an int


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place to another, and add formatting fixes to the old code


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to wnoutrefresh() calls, except for those in total_update() and
do_credits(); call doupdate() just before using blocking input, since
nano spends the most time using it, for blocking input; and only do
constant sursor position display if we're just about to use blocking
input


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its last line when all its lines are numbered properly, use that in
place of openfile->totlines, and eliminate references to
openfile->totlines


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do_statusbar_output() after do_statusbar_mouse(), to match do_output()'s
being after do_mouse() in nano.c


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spell checking, justifying, and word counting) to their own source file,
text.c


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