add space alias for key filter

yyx990803 · yyx990803 · commit 2902284d89bc · 2015-09-09T12:45:28.000-04:00
diff --git a/source/api/filters.md b/source/api/filters.md
@@ -75,6 +75,7 @@ Wrap the handler so it only gets called when the keyCode matches the argument. Y
 - down
 - left
 - right
+- space
 
 **Example:**
 

-Original file line number
+Diff line change
 - down
 - left
 - right
 +- space
 **Example:**