Syntax:  GOTO SOURCE

  Displays the source corresponding to the current diagnostic or show
  list entry.

  This command moves the current editing position to the source
  associated with the diagnostic, or to the buffer or mark indicated.
  When a diagnostic is selected in this manner, LSE may display a
  suggested error correction and prompt for a confirmation.

  When the cursor is located on a diagnostic in a review buffer or an
  entry in a show list of marks or buffers, LSE highlights the current
  list entry or diagnostic.