Update comments for isExecuted

Haven't changed AlgorithmProxy as that class will be deleted in the next PR

Framework/API/inc/MantidAPI/IAlgorithm.h

@@ -122,7 +122,7 @@ public:
 
   /// Check whether the algorithm is initialized properly
   virtual bool isInitialized() const = 0;
-  /// Check whether the algorithm has already been executed
+  /// Check whether the algorithm has been executed sucessfully
   virtual bool isExecuted() const = 0;
 
   /// Raises the cancel flag. interuption_point() method if called inside exec()

Framework/API/src/Algorithm.cpp

@@ -141,7 +141,7 @@ bool Algorithm::isInitialized() const {
   return (m_executionState != ExecutionState::Uninitialized);
 }
 
-/// Has the Algorithm already been executed
+/// Has the Algorithm already been executed successfully
 bool Algorithm::isExecuted() const {
   return ((executionState() == ExecutionState::Finished) &&
           (resultState() == ResultState::Success));