vimrc: Use Undotree on Windows

The Vim I'm using on Windows has `+python/dyn` and `+python3/dyn` (no
`+python3`), but it doesn't seem like it has a Python interpreter that
Vim can find. Use Undotree instead of Gundo there since it doesn't
require Python.

1 files changed, 4 insertions, 1 deletions

diff --git a/vimrc b/vimrc
index f9c6488..c931171 100644
--- a/vimrc
+++ b/vimrc
@@ -435,6 +435,9 @@
 "   2019.06.18:
 "       * Ignore `.git` directory in `g:pick_command`.
 "
+"   2019.07.03:
+"       * Use Undotree on Windows.
+"
 
 
 " Pathogen
@@ -626,7 +629,7 @@ endif
 
 
 " Gundo / Undotree
-if has('python3')
+if has('python3') || has('win32') || has('win32unix')
 	let loaded_gundo = 1
 
 	let g:undotree_SetFocusWhenToggle = 1