diff --git a/.gitignore b/.gitignore
index de9ffb251..adef2f79a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,3 +25,4 @@ bld/
 # Visual Studio cache/options directory
 
 .vs/
+.DS_Store
diff --git a/docs/a.md b/docs/a.md
new file mode 100644
index 000000000..f361004f6
--- /dev/null
+++ b/docs/a.md
@@ -0,0 +1,4 @@
+# TODO
+
+Open Source License
+