bugfix: zoom in/out hotkeys

Dependencies

• [2] AVTNUQYR basic test-enabled framework
• [*] OTIBCAUJ love2d scaffold
• [*] Z4KNS42N to open a file without a terminal, drag it on!

Change contents

• edit in main.lua at line 131
  [5.7]

  [2.1321]
  + function initialize_font_settings(font_height)

  + Editor_state.font_height = font_height

  + love.graphics.setFont(love.graphics.newFont(Editor_state.font_height))

  + Editor_state.line_height = math.floor(font_height*1.3)

  + Editor_state.em = App.newText(love.graphics.getFont(), 'm')

  + end

  +