qjson: Drop trailing space for pretty formatting

For the pretty formatting, the functions converting QDicts and QLists to
JSON should not print a space after the comma separating objects,
because a newline will emitted immediately afterwards, making the
whitespace superfluous.
Signed-off-by: NMax Reitz <mreitz@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NKevin Wolf <kwolf@redhat.com>

qobject/qjson.c

@@ -86,8 +86,9 @@ static void to_json_dict_iter(const char *key, QObject *obj, void *opaque)
     QString *qkey;
     int j;
 
-    if (s->count)
-        qstring_append(s->str, ", ");
+    if (s->count) {
+        qstring_append(s->str, s->pretty ? "," : ", ");
+    }
 
     if (s->pretty) {
         qstring_append(s->str, "\n");
@@ -109,8 +110,9 @@ static void to_json_list_iter(QObject *obj, void *opaque)
     ToJsonIterState *s = opaque;
     int j;
 
-    if (s->count)
-        qstring_append(s->str, ", ");
+    if (s->count) {
+        qstring_append(s->str, s->pretty ? "," : ", ");
+    }
 
     if (s->pretty) {
         qstring_append(s->str, "\n");