space after comma

Author: Andrew Johnson

basic_distributions/binormal.stan

@@ -1,7 +1,7 @@
 transformed data {
     matrix[2,2] Sigma = [[1, 0.1],
                          [0.1, 1]];
-    vector[2] mu = [0,0]';
+    vector[2] mu = [0, 0]';
 }
 parameters {
     vector[2] y;