Add List All Buffers as a vim til.

README.md

@@ -37,6 +37,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 - [Close the Current Buffer](vim/close-the-current-buffer.md)
 - [Generate and Edit Rails Migration](vim/generate-and-edit-rails-migration.md)
 - [Head of File Name](vim/head-of-file-name.md)
+- [List All Buffers](vim/list-all-buffers.md)
 - [Opening a URL](vim/opening-a-url.md)
 - [Preview Buffer](vim/previous-buffer.md)
 - [Quick File Info](vim/quick-file-info.md)

vim/list-all-buffers.md

@@ -0,0 +1,12 @@
+# List All Buffers
+
+The `:ls` command will list the buffers you have open. What vim doesn't tell
+you though is that there are some unlisted buffers that it isn't displaying.
+To see *all* of the buffers, you can use `:ls!`. According to the vim help
+file:
+
+> When the [!] is included the list will show unlisted buffers
+> (the term "unlisted" is a bit confusing then...).
+
+This reveals buffers for `netrw`, `:help` files, etc. This helps explain the
+sometimes sporadic numbering that vim uses for buffers.