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)

>1+0&#ffffff0| @73
|2| @73
|3| @73
|4| @31|f+0#0000001#ffd7ff255|o|u|r| @3| +0#0000000#ff404010| +0&#ffffff0@32
|5| @31|f+0#0000001#ffd7ff255|i|v|e| @3| +0#0000000#4040ff13| +0&#ffffff0@32
|6| @31|s+0#0000001#ffd7ff255|i|x| @4| +0#0000000#4040ff13| +0&#ffffff0@32
|7| @31|s+0#0000001#ffd7ff255|e|v|e|n| @2| +0#0000000#ff404010| +0&#ffffff0@32
|8| @73
|9| @73
|:|c|a|l@1| |C|l|i|c|k|T|o|p|(|)| @40|1|,|1| @10|T|o|p|