allow hyphenated namespaces

Author: kortschak

Go/Go.sublime-syntax

@@ -132,7 +132,7 @@ contexts:
     # highlighting them as compiler pragmas could be misleading. We scope them
     # as plain comments by default, and add some detailed meta scopes for
     # enterprising users wishing to add more color.
-    - match: (//)([a-z]+)(:)({{directive}})[ ]?
+    - match: (//)([a-z]+[a-z-]*)(:)({{directive}})[ ]?
       captures:
         1: punctuation.definition.comment.go
         2: meta.keyword.annotation.go

Go/syntax_test_go.go

@@ -70,6 +70,15 @@ You may have to disable Go-specific linters when working on this file.
 //    ^^ meta.keyword.annotation.go
 //       ^^^^^^^^ meta.variable.function.go
 //                ^^^^^^^^^^^^^ meta.variable.parameter.go
+//                             ^ comment.line.go -meta.annotation
+
+    //go-sumtype:decl MySumType
+// ^ -comment -meta -punctuation
+//  ^^ punctuation.definition.comment.go
+//  ^^^^^^^^^^^^^^^^^^^^^^^^^^^ meta.annotation.go comment.line.go
+//    ^^^^^^^^^^ meta.keyword.annotation.go
+//               ^^^^ meta.variable.function.go
+//                    ^^^^^^^^^ meta.variable.parameter.go
 //                             ^ comment.line.go -meta.annotation
 
     //lint:ignore U1000 Reason.