Remove added colon in comment-spacings rule

RULES_DESCRIPTIONS.md

@@ -182,15 +182,15 @@ _Description_: Spots comments of the form:
 
 _Configuration_: ([]string) list of exceptions. For example, to accept comments of the form
 ```go
-//mypragma: activate something
+//+optional
 ```
-You need to add `"mypragma"` in the configuration
+You need to add `"+optional"` in the configuration
 
 Example:
 
 ```toml
 [rule.comment-spacings]
-  arguments =["mypragma","otherpragma"]
+  arguments =["+optional", "foo:"]
 ```
 ## confusing-naming
 

rule/comment-spacings.go

@@ -31,7 +31,7 @@ func (r *CommentSpacingsRule) configure(arguments lint.Arguments) {
 			if !ok {
 				panic(fmt.Sprintf("invalid argument %v for %s; expected string but got %T", arg, r.Name(), arg))
 			}
-			r.allowList = append(r.allowList, `//`+allow+`:`)
+			r.allowList = append(r.allowList, `//`+allow)
 		}
 	}
 }