Add Re-indenting Your Code as a vim til.

README.md

@@ -99,6 +99,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 - [Quick File Info](vim/quick-file-info.md)
 - [Quick Man Pages](vim/quick-man-pages.md)
 - [Quick Quickfix List Navigation](vim/quick-quickfix-list-navigation.md)
+- [Re-indenting Your Code](vim/reindenting-your-code.md)
 - [Rename Current File](vim/rename-current-file.md)
 - [Repeat The Previous Change](vim/repeat-the-previous-change.md)
 - [Scrolling Relative to the Window](vim/scrolling-relative-to-the-window.md)

vim/reindenting-your-code.md

@@ -0,0 +1,33 @@
+# Re-indenting Your Code
+
+If you have pasted some poorly formatted code or you've written a portion
+of code in a way that mangled the indentation, you can quickly re-indent
+that code for you. Or at least do its best to try and indent it correctly.
+
+Make a visual selection of the code that you want to re-indent and then
+hit `=`.
+
+For instance, this ruby code
+
+```ruby
+if this_thing
+p something
+else
+p nothing
+end
+```
+
+will be indented by Vim as
+
+```ruby
+if this_thing
+  p something
+else
+  p nothing
+end
+```
+
+See `:h =` for more details on how vim decides what formatting and
+indenting it will do.
+
+h/t [Chris Erin](https://twitter.com/MCNormalMode)