Fix rust trait/iter snippet name conflict

Author: Avi-D-coder

UltiSnips/rust.snippets

@@ -28,7 +28,7 @@ snippet fmt "format!(..)"
 format!("$1"${2/..*/, /}$2);
 endsnippet
 
-snippet it ".iter()" i
+snippet .it ".iter()" i
 .iter()$0
 endsnippet