patch 9.0.1078: with the +vartabs feature indent folding may use wrong 'ts' Commit: https://github.com/vim/vim/commit/07146ad1d33ba0d36b324873e5c461931e6b025e Author: zeertzjq <zeertzjq@outlook.com> Date: Mon Dec 19 15:51:44 2022 +0000 patch 9.0.1078: with the +vartabs feature indent folding may use wrong 'ts' Problem: With the +vartabs feature indent folding may use wrong 'tabstop'. Solution: Use the "buf" argument instead of "curbuf".

> +0&#ffffff0@74
|~+0#4040ff13&| @73
|~| @73
|~| @73
|~| @73
|~| @73
|~| @73
|~| @73
|~| @73
|E+0#ffffff16#e000002|1@1|7|:| |U|n|k|n|o|w|n| |f|u|n|c|t|i|o|n|:| |N|o|S|u|c|h|F|u|n|c| +0#0000000#ffffff0@22|0|,|0|-|1| @8|A|l@1|