Add end of file newline to .gitignore

(for important and good reasons)

PiperOrigin-RevId: 279361541

.gitignore

diff --git a/.gitignore b/.gitignore
index 368331f..2d53141 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,4 +27,4 @@
 imgui.ini
 
 # Emacs autosaves
-*~
\ No newline at end of file
+*~