add test case

Author: mateusz834

gopls/internal/golang/hover_test.go

@@ -109,6 +109,22 @@ const (
 	D
 	E
 )
+`,
+			groupComment: []string{"foo", "foo", "bar", "bar"},
+		},
+		{
+			src: `package test
+const (
+	/* foo */
+	A = iota
+	// doc comment
+	C
+
+	/* bar */
+	D
+	// doc comment
+	E // line comment
+)
 `,
 			groupComment: []string{"foo", "foo", "bar", "bar"},
 		},