UniValue: compact (!pretty) output should not include extra whitespace

src/univalue/univalue_write.cpp

@@ -91,8 +91,11 @@ void UniValue::writeArray(unsigned int prettyIndent, unsigned int indentLevel, s
         if (prettyIndent)
             s += indentStr(prettyIndent, indentLevel);
         s += values[i].write(prettyIndent, indentLevel + 1);
-        if (i != (values.size() - 1))
-            s += ", ";
+        if (i != (values.size() - 1)) {
+            s += ",";
+            if (prettyIndent)
+                s += " ";
+        }
         if (prettyIndent)
             s += "\n";
     }
@@ -111,7 +114,9 @@ void UniValue::writeObject(unsigned int prettyIndent, unsigned int indentLevel,
     for (unsigned int i = 0; i < keys.size(); i++) {
         if (prettyIndent)
             s += indentStr(prettyIndent, indentLevel);
-        s += "\"" + json_escape(keys[i]) + "\": ";
+        s += "\"" + json_escape(keys[i]) + "\":";
+        if (prettyIndent)
+            s += " ";
         s += values[i].write(prettyIndent, indentLevel + 1);
         if (i != (values.size() - 1))
             s += ",";