Benno Schulenberg 5618189643 prompt: trim a double-width character at the screen's edge
It needs to be trimmed and substituted with a single-width placeholder
to prevent the continuation character ">" from getting pushed to the
next row.

Also, use the correct width for the answer so that the continuation
character is only displayed when the answer does not fit any more.

This fixes https://savannah.gnu.org/bugs/?55620.
Reported-by: David Lawrence Ramsey <pooka109@gmail.com>

Original-patch-by: David Lawrence Ramsey <pooka109@gmail.com>
2019-02-07 20:04:56 +01:00
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