Bug 40785 [plan item] Overview ruler improvements
- navigation from ruler to editor - hovering over header area shows number of errors/warning (header annotations in general)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/filebuffers/CompilationUnitDocumentProvider2.java
try {
				
				fIsAboutToSave= true;
				
				
				if (JavaPlugin.USE_WORKING_COPY_OWNERS) {
					info.fCopy.commitWorkingCopy(overwrite, monitor);
				} else {
					info.fCopy.commit(overwrite, monitor);
					
					saveDocumentContent(monitor, element, ignore, overwrite);
				}
					
					
			} catch (CoreException x) {
				
				fireElementStateChangeFailed(element);
				throw x;
			} catch (RuntimeException x) {
				
				fireElementStateChangeFailed(element);
				throw x;
			} finally {
				fIsAboutToSave= false;
			}