slightly tweak boundary between concerns

Dependencies

• [2] XX7G2FFJ intermingle freehand line drawings with text
• [3] Z2CJVAPV lighter border for figures
• [4] G77XIN7M selecting a stroke
• [*] OTIBCAUJ love2d scaffold

Change contents

• edit in main.lua at line 43
  [2.726]→[2.726:785](∅→∅)
  − love.graphics.rectangle('line', 12,y, line.w,line.h)
• edit in main.lua at line 44
  [2.804]

  [2.804]
  + love.graphics.rectangle('line', 12,line.y, line.w,line.h)