Add Interact With The Alternate File as a vim til

Author: jbranchaud

Diff for: README.md

@@ -372,6 +372,7 @@ _348 TILs and counting..._
 - [Horizontal to Vertical and Back Again](vim/horizontal-to-vertical-and-back-again.md)
 - [Incremental Searching](vim/incremental-searching.md)
 - [Increment All The Numbers](vim/increment-all-the-numbers.md)
+- [Interact With The Alternate File](vim/interact-with-the-alternate-file.md)
 - [Interactive Buffer List](vim/interactive-buffer-list.md)
 - [Joining Lines Together](vim/joining-lines-together.md)
 - [Jump To Matching Pair](vim/jump-to-matching-pair.md)

Diff for: vim/interact-with-the-alternate-file.md

@@ -0,0 +1,18 @@
+# Interact With The Alternate File
+
+If you have a couple buffers going in a Vim session and you check out the
+buffer list with `:ls`, you'll notice that one of those buffers has a `#`
+indicator next to it. That means the file for this buffer is considered the
+alternate file of the current, visible buffer. In addition to hitting
+`CTRL-^` to switch to that buffer, you can reference it in other commands
+with `#`. This means you can quickly `:edit`, `:split`, `:vsplit`, and so
+forth the alternate file by just giving `#` as the argument to those
+commands.
+
+Quickly open the alternate file in a vertical split with:
+
+```
+:vsp #
+```
+
+See `:h alternate-file` for more details.