Python ruff formatter (#484)

Add python ruff formatter support

https://github.com/astral-sh/ruff

README.md

@@ -466,7 +466,8 @@ that caused Neoformat to be invoked.
     [`pydevf`](https://github.com/fabioz/PyDev.Formatter),
     [`isort`](https://github.com/timothycrosley/isort),
     [`docformatter`](https://github.com/myint/docformatter),
-    [`pyment`](https://github.com/dadadel/pyment)
+    [`pyment`](https://github.com/dadadel/pyment),
+    [`ruff`](https://github.com/astral-sh/ruff)
 - R
   - [`styler`](https://github.com/r-lib/styler),
     [`formatR`](https://github.com/yihui/formatR)

autoload/neoformat/formatters/python.vim

@@ -1,5 +1,5 @@
 function! neoformat#formatters#python#enabled() abort
-    return ['yapf', 'autopep8', 'black', 'isort', 'docformatter', 'pyment', 'pydevf']
+    return ['yapf', 'autopep8', 'black', 'isort', 'docformatter', 'pyment', 'pydevf', 'ruff']
 endfunction
 
 function! neoformat#formatters#python#yapf() abort
@@ -58,3 +58,11 @@ function! neoformat#formatters#python#pydevf() abort
                 \ 'replace': 1,
                 \ }
 endfunction
+
+function! neoformat#formatters#python#ruff() abort
+    return {
+                \ 'exe': 'ruff',
+                \ 'stdin': 1,
+                \ 'args': ['format', '-q', '-'],
+                \ }
+endfunction

doc/neoformat.txt

@@ -432,7 +432,8 @@ SUPPORTED FILETYPES				*neoformat-supported-filetypes*
     [`pydevf`](https://github.com/fabioz/PyDev.Formatter),
     [`isort`](https://github.com/timothycrosley/isort),
     [`docformatter`](https://github.com/myint/docformatter),
-    [`pyment`](https://github.com/dadadel/pyment)
+    [`pyment`](https://github.com/dadadel/pyment),
+    [`ruff`](https://github.com/astral-sh/ruff)
 - R
   - [`styler`](https://github.com/r-lib/styler),
     [`formatR`](https://github.com/yihui/formatR)