Ignore a.out.

tyabu12 · tyabu12 · commit 3237e6cc23d3 · 2018-11-30T14:32:12.000+09:00
diff --git a/.gitignore b/.gitignore
@@ -23,5 +23,8 @@ setup.log
 # Merlin configuring file for Vim and Emacs
 .merlin
 
+# Executable file
+a.out
+
 # Metro data
 metro.ml
