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Update README: add improved undojoin solution. #366

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Update README: add improved undojoin solution. #366

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10 changes: 10 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -211,6 +211,16 @@ augroup fmt
augroup END
```

However, undojoin is not allowed after undo, and save the buffer , the
following script will attempts to catch that error and perform a normal
format instead:
```viml
augroup fmt
autocmd!
au BufWritePre * try | undojoin | Neoformat | catch /^Vim\%((\a\+)\)\=:E790/ | finally | silent Neoformat | endtry
augroup END
```

When `undojoin` is used this way pressing `u` will "skip over" the Neoformat
changes - it will revert both the changes made by Neoformat and the change
that caused Neoformat to be invoked.
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