add `*.swp` to .gitignore
diff --git a/.gitignore b/.gitignore
index 70ad6e9..4c0cb4e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,3 +32,4 @@
 .Trashes
 ehthumbs.db
 Thumbs.db
+*.swp