bugfix typo

Dependencies

• [2] 3D5RFWHV stop handling drawings in cursor_pos computations
• [3] IYW7X3WL left/right cursor movement, deleting characters
• [4] 3CS5KKCI up/down cursor movement
• [5] 2INHXC3K position cursor by clicking on text
• [*] OTIBCAUJ love2d scaffold

Change contents

• replacement in main.lua at line 581
  [2.248]→[2.248:284](∅→∅)
  − cursor_line = cursor_line+1
  [2.248]

  [2.284]
  + cursor_line = cursor_line-1