Update README.md

Simplify convoluted way of exiting vim using handy grep trick.
2020-01-10 14:42:29 +00:00 · 2020-01-10 14:42:29 +00:00 · d8eedcfe3b
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@ -7,7 +7,7 @@ For real vim (and hacking) tips, follow [hakluke](https://twitter.com/hakluke) a
 Credit: @tomnomnom

 ```vim
-:!ps axuw | grep vim | grep -v grep | awk '{print $2}' | xargs kill -9
+:!ps axuw | grep vi[m] | awk '{print $2}' | xargs kill -9
 ```
 ### Video tutorial:
 [![tomnomnom](http://img.youtube.com/vi/xteTjU8GNMc/0.jpg)](http://www.youtube.com/watch?v=xteTjU8GNMc "tomnomnom")