encoding/gob: add comma in field comment of userTypeInfo for consistency

Change-Id: I80c494a357195dad3ade98fcce0a6883303777ce
GitHub-Last-Rev: a30615f
GitHub-Pull-Request: #62422
Reviewed-on: https://go-review.googlesource.com/c/go/+/524998
Run-TryBot: Joseph Tsai <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Reviewed-by: Joseph Tsai <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>

Author: callthingsoff

src/encoding/gob/type.go

@@ -24,7 +24,7 @@ type userTypeInfo struct {
 	base        reflect.Type // the base type after all indirections
 	indir       int          // number of indirections to reach the base type
 	externalEnc int          // xGob, xBinary, or xText
-	externalDec int          // xGob, xBinary or xText
+	externalDec int          // xGob, xBinary, or xText
 	encIndir    int8         // number of indirections to reach the receiver type; may be negative
 	decIndir    int8         // number of indirections to reach the receiver type; may be negative
 }