ignore comments when selecting buffer name

Dependencies

• [2] BSDXVB3H backport some doc updates and renames
• [3] GXE3ESLG abstraction: roll forward/back
• [4] LRDM35CE app running again

Change contents

• replacement in live.lua at line 227
  [2.938]→[2.938:970](∅→∅)
  − return buf:match('^%s*(%S+)')
  [2.938]

  [2.970]
  + return buf:gsub('%-%-[^\n]*', ''):match('^%s*(%S+)')