terraform removing spaces - I need to understand these map type defs

apolloakora · apolloakora · commit f2adbaa76daf · 2019-07-23T11:14:04.000+01:00
diff --git a/security.group-rules.tf b/security.group-rules.tf
@@ -32,7 +32,7 @@
 
 variable rules {
 
-    type = map( string, list( string ) )
+    type = map(string,list(string))
 
     default = {
         "https"       = [ "443", "443", "tcp",   "http secured" ]
