Do not show address for (pseudo) instructions with no code
While such instructions do not appear in GDB-produced disassembly,
they may appear in some manually-generated instruction lists.
One example of such (pseudo) instruction is label.
"/ VDB init script
"/ Current VDB instance (instance of VDBDebuggerApplication) can be accessed
"/ in via variable `vdb`
"/ Current GDB instance (instance of GDBDebugger) can be accessed via
"/ `vdb debugger`.
"/ Load plugins.
"/
"/ Smalltalk loadPackage: 'jv:vdb/plugins/xyz'
"/ Set console prompt
"/
"/ vdb debugger send: 'set prompt vdb > '.
"/ Set light mode (theme)
"/
"/ View defaultStyle:#'Adwaita'.
"/ UserPreferences current codeViewTheme: Solarized new. "/ choose one...
"/ UserPreferences current codeViewTheme: nil. "/ ...or the other
"/
"/ Set dark mode
"/
"/ View defaultStyle:#'Adwaita_dark'.
"/ UserPreferences current codeViewTheme: SolarizedDark new. "/ choose one...
"/ UserPreferences current codeViewTheme: Monokai new. "/ ...or the other
"/ Set default text font for all text and list views
"/
"/ VDBAbstractApplication defaultTextFont: (FontDescription family:#'DejaVu Sans Mono' face:#normal size:12).
"/ VDBAbstractApplication defaultTextFont: (CodeView defaultFont asSize: 16).
"/ Choose debugger layout. For list of layouts, see VDBDebuggerApplicaton class,
"/ protocol 'interface specs - layouts'. Default is #layoutEclipseSpec.
"/
"/ vdb layout: #layoutEclipseSpec.
"/ vdb layout: #layoutIDAProSpec.
"/ vdb layout: #layoutSingleSpec.
"/ Enable pretty printers and frame filters in user interface.
"/ Very likely you want this, if you want to turn the off
"/ (not recommended), comment out following:
vdb debugger enablePrettyPrinting.
vdb debugger enableFrameFilters.