docs: add 'plus one' to correct getmousepos docs

This change was applied to Vim as part of 90df4b9.
90df4b9d42
This commit is contained in:
Daniel Steinberg 2021-07-08 00:38:00 -04:00
parent 096309037b
commit 88442c2fa6

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@ -5122,7 +5122,7 @@ getmousepos() *getmousepos()*
are zero.
When the position is after the text then "column" is the
length of the text in bytes.
length of the text in bytes plus one.
If the mouse is over a focusable floating window then that
window is used.