json: add space between k:v when prettyprinting.

Signed-off-by: Eric Myhre <hash@exultant.us>

Author: warpfork

json/jsonCommon.go

@@ -15,4 +15,5 @@ var (
 	wordMapClose = []byte("}")
 	wordColon    = []byte(":")
 	wordComma    = []byte(",")
+	wordSpace    = []byte(" ")
 )

json/jsonEncoder.go

@@ -91,6 +91,9 @@ func (d *Encoder) Step(tok *Token) (done bool, err error) {
 				d.entrySep()
 				d.emitString(tok.Str)
 				d.wr.Write(wordColon)
+				if d.cfg.Line != nil {
+					d.wr.Write(wordSpace)
+				}
 				d.current = phase_mapExpectValue
 				return false, nil
 			default: