Developer's-corner/Configuration-Checks.md

@@ -9,10 +9,12 @@ When loading the configuration, all registered checks will be called upon the pr
 
 ## example
 
+Let say you want to make sure that user does not specify both co-rotating referential and the rotation speed:
+
 ```
 bool
 CheckReferentialRotation(pt::ptree const& pt, std::ostream& log) {
-      DiskReferentialType type = pt.get<DiskReferentialType>("Disk.Referential.Type");
+  DiskReferentialType type = pt.get<DiskReferentialType>("Disk.Referential.Type");
   bool pass = true;
   switch (type) {
   case DR_COROTATING: