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#af5f00255#ffffff0@1|1| |o+0#0000000&|n|e| |o|n|e| |o|n|e| @59
| +0#af5f00255&@1|2| |t+0#0000000&|w|o| |t|w|o| |t|w|o| @59
| +0#af5f00255&@3| +0#0000000&@2|└+0&#ffff4012|─| |V|i|r|t|u|a|l| |t|e|x|t| |b|e|l|o|w| |t|h|e| |2|n|d| |l|i|n|e| +0&#ffffff0@33
| +0#af5f00255&@1|3| |x+0#0000000&>x| @68
| +0#af5f00255&@1|4| |t+0#0000000&|h|r|e@1| |t|h|r|e@1| |t|h|r|e@1| @53
|~+0#4040ff13&| @73
|~| @73
|:+0#0000000&|s|e|t| |n|u|m|b|e|r| @45|3|,|2| @10|A|l@1|