Fix various trailing whitespace issues and typos

src/Mod/Import/App/StepShape.h

@@ -34,7 +34,7 @@ namespace Import
  * convenient access to the Mesh data structure. This class should not be used
  * for programming algorithms in C++. Use Mesh Core classes instead!
  */
-class ImportExport StepShape 
+class ImportExport StepShape
 {
 public:
     StepShape();