improved the naming rule

qse/regress/awk/lang-005.awk

@@ -1,7 +1,12 @@
-function a (a) { print a; } 
+function x (y) { print y; }
+function a (x) { print x; } 
 
 BEGIN {
 	local a;
 	a = 20; 
-	a (1000); 
+	a (1000);
+	{
+		local a;
+		print a;
+	}
 }