patch 8.2.4338: an error from an expression mapping messes up the display Commit: https://github.com/vim/vim/commit/74a0a5b26d0180f3ea89e9495dff6a26f0df23cb Author: Bram Moolenaar <Bram@vim.org> Date: Thu Feb 10 14:07:41 2022 +0000 patch 8.2.4338: an error from an expression mapping messes up the display Problem: An error from an expression mapping messes up the display. Solution: When the expression results in an empty string return K_IGNORE. In cmdline mode redraw the command line. (closes #9726)

| +2&#ffffff0|+| |[|N|o| |N|a|m|e|]| | +8#0000001#e0e0e08|[|N|o| |N|a|m|e|]| | +1#0000000#ffffff0@49|X+8#0000001#e0e0e08
>1+0#0000000#ffffff0| @73
|2| @8|h+0&#5fd7ff255|e|l@1|o| |t|h|e|r|e| @8|r+0&#afffff255| |o|n|e| @8| +0&#ffffff0@30
|3| @22|a+0&#afffff255|n|o|t|h|e|r| |t|w|o| @8| +0&#ffffff0@30
|4| @22|a+0&#afffff255|n|o|t|h|e|r| |t|h|r|e@1| @6| +0&#ffffff0@30
|5| @73
|6| @73
|7| @73
|8| @73
@57|1|,|1| @10|T|o|p|