gitignore: add a trailing newline

mathstuf · cramertj · commit 73acd6e3cf92 · 2019-10-02T15:53:48.000-07:00
All lines should end with a newline.
diff --git a/.gitignore b/.gitignore
@@ -4,4 +4,4 @@ Cargo.lock
 _site
 .sass-cache
 .idea
-.DS_Store
+.DS_Store
