This fixes https://savannah.gnu.org/bugs/?52972

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

When a fragment of help text does not contain any whitespace that
we can wrap at, just advance the pointer, because returning zero
would mean we stay forever at the same place: nano would hang.

After commit e739448c, macros should work also when ncurses produces
escape sequences instead of keycodes.

So one doesn't find it when grepping for get_input().

Reported-by: Tom Levy <tomlevy93@gmail.com>

That is, call display_string() just on the filename, not on the rest
of the prompt text.

This fixes https://savannah.gnu.org/bugs/?52967

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Reported-by: Andreas Schamanek <schamane@fam.tuwien.ac.at>

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

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

This fixes the second part of https://savannah.gnu.org/bugs/?52960.

This fixes the first part of https://savannah.gnu.org/bugs/?52960.

This fixes https://savannah.gnu.org/bugs/?52930

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Reported-by: Michail Tsiolkas <mtsio@cryptolab.net>

Also, reshuffle a case, to put the short one first and lose a line.

Instead of assuming that the entire contents of the keybuffer are an
escape sequence (even if this is far longer than any escape sequence
can be), remove from the keybuffer only those integers that actually
constituted a sequence, valid or invalid.

This fixes https://savannah.gnu.org/bugs/?48659.

This fixes https://savannah.gnu.org/bugs/?52943.

Trimming trailing spaces is good, but we should not trim the space
(or tab or other blank) that the user just typed and that caused the
hard-wrapping to occur.

This fixes https://savannah.gnu.org/bugs/?52948

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Reported-by: Andreas Schamanek <schamane@fam.tuwien.ac.at>

This fixes https://savannah.gnu.org/bugs/?52925

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

And rewrap some lines, three of them to make them equal to another.

At that point, ptr will necessarily point at EOL -- *ptr == '\0'.

This fixes https://savannah.gnu.org/bugs/?52896

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Reported-by: Miki Strange <mik@mikistrange.com>
Tested-by: Miki Strange <mik@mikistrange.com>

It will be reallocated soon enough when the size increases again.

Also remove an unneeded nulling.

The verbosity "hid" the really relevant information:
filename, line number, and the error message.

Valid values and other details can be found in the manual pages.

When the palette is getting initialized, it is too late to send any
error messages about the rcfile options to standard error.

This fixes https://savannah.gnu.org/bugs/?52871

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