patch 8.2.2926: Vim9: no good error for using :legacy in a :def function Commit: https://github.com/vim/vim/commit/c3cb1c92a335be818971acd89f631e82aa30ad3f Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jun 2 16:47:53 2021 +0200 patch 8.2.2926: Vim9: no good error for using :legacy in a :def function Problem: Vim9: no good error for using :legacy in a :def function. Solution: Give an explicit error where :legacy is not working. (closes #8309)

| +0#0000e05#a8a8a8255@1|x+0#0000000#ffffff0@72
| +0#0000e05#a8a8a8255@1|x+0#0000000#ffffff0@1| @70
|=+0&#ffff4012|>>m+0&#ffffff0@3| @68
| +0#0000e05#a8a8a8255@1|y+0#0000000#ffffff0@3| @68
|~+0#4040ff13&| @73
| +0#0000000&@56|2|,|1| @10|A|l@1|