docs: def reverseCommit(self):
          """
          Re-insert the previously deleted line.
          """
  
          # Get the text cursor for the current document.
          tc = self.qteWidget.textCursor()
  
          # Re-insert the deleted text at the correct position.
          tc.setPosition(self.cursorPos0)
          tc.insertHtml(self.killedText)
  
          # Apply the changes.
          self.qteWidget.setTextCursor(tc)