avoid some unnecessary allocations

Dependencies

• [2] AQRAWL63 don't tolerate Lua comments when parsing commands
• [3] VA7NGQLG ignore comments when selecting buffer name
• [4] LRDM35CE app running again
• [5] GXE3ESLG abstraction: roll forward/back
• [6] BSDXVB3H backport some doc updates and renames

Change contents

• edit in live.lua at line 233
  [3.938]

  [2.131]
  + -- return the first word
• replacement in live.lua at line 238
  [2.219]→[3.10:65](∅→∅),[3.938]→[3.10:65](∅→∅)
  − return buf:gsub('%-%-[^\n]*', ''):match('^%s*(%S+)')
  [2.219]

  [3.970]
  + -- Return the first word, after skipping Lua comments.

  + if not buf:match('^%s*%-%-') then

  + return buf:match('^%s*(%S+)') -- avoid unnecessary allocations

  + end

  + -- wastefully strip out comments everywhere, not just at the start

  + buf = buf:gsub('%-%-[^\n]*', '') -- line comments

  + return buf:match('^%s*(%S+)')