Accept comma and semicolon characters in text format maps.
This makes this consistent with the C++ parser and structs in general.
diff --git a/proto/text_parser_test.go b/proto/text_parser_test.go
index 2e51da3..cfc0db6 100644
--- a/proto/text_parser_test.go
+++ b/proto/text_parser_test.go
@@ -462,7 +462,7 @@
func TestMapParsing(t *testing.T) {
m := new(MessageWithMap)
const in = `name_mapping:<key:1234 value:"Feist"> name_mapping:<key:1 value:"Beatles">` +
- `msg_mapping:<key:-4 value:<f: 2.0>>` +
+ `msg_mapping:<key:-4, value:<f: 2.0>,>` + // separating commas are okay
`msg_mapping<key:-2 value<f: 4.0>>` + // no colon after "value"
`byte_mapping:<key:true value:"so be it">`
want := &MessageWithMap{