Client code for robot position webpage.

Change-Id: I935dfe7242cd4a8c5b9b3bc8d6e137d29786e0f1
diff --git a/y2019/vision/server/server.cc b/y2019/vision/server/server.cc
index 80e5fb4..1ed6ac9 100644
--- a/y2019/vision/server/server.cc
+++ b/y2019/vision/server/server.cc
@@ -155,10 +155,10 @@
       std::ostringstream stream;
       stream << "{\n";
 
-      stream << "'robot': {";
-      stream << "'x': " << drivetrain_status->x << ",";
-      stream << "'y': " << drivetrain_status->y << ",";
-      stream << "'theta': " << drivetrain_status->theta;
+      stream << "\"robot\": {";
+      stream << "\"x\": " << drivetrain_status->x << ",";
+      stream << "\"y\": " << drivetrain_status->y << ",";
+      stream << "\"theta\": " << drivetrain_status->theta;
       stream << "}\n";
 
       stream << "}";