bugfix: path munging on Windows

Dependencies

• [2] KKMFQDR4 editing source code from within the app
• [3] X3CQLBTR set window title within each app
• [4] OI4FPFIN support drawings in the source editor
• [5] 2L5MEZV3 experiment: new edit namespace
• [6] TGZAJUEF bring back a set of constants
• [7] CQYKYJJU remember window positions across restart/ctrl+e
• [8] LF7BWEG4 group all editor globals

Change contents

• replacement in source_edit.lua at line 103
  [2.155031]→[2.155031:155096](∅→∅)
  − filename = love.filesystem.getUserDirectory()..'/lines.txt',
  [2.155031]

  [2.155096]
  + filename = love.filesystem.getUserDirectory()..'/lines.txt', -- '/' should work even on Windows
• replacement in source.lua at line 260
  [2.173955]→[2.173955:174094](∅→∅)
  − if filename:sub(1,1) ~= '/' then

  − filename = love.filesystem.getWorkingDirectory()..'/'..filename -- '/' should work even on Windows
  [2.173955]

  [2.174094]
  + local os_path_separator = package.config:sub(1,1)

  + if filename:sub(1,1) ~= os_path_separator then

  + filename = love.filesystem.getWorkingDirectory()..os_path_separator..filename
• replacement in run.lua at line 144
  [2.182611]→[2.182611:182750](∅→∅)
  − if filename:sub(1,1) ~= '/' then

  − filename = love.filesystem.getWorkingDirectory()..'/'..filename -- '/' should work even on Windows
  [2.182611]

  [2.182750]
  + local os_path_separator = package.config:sub(1,1)

  + if filename:sub(1,1) ~= os_path_separator then

  + filename = love.filesystem.getWorkingDirectory()..os_path_separator..filename
• replacement in edit.lua at line 97
  [3.3616]→[3.97595:97660](∅→∅)
  − filename = love.filesystem.getUserDirectory()..'/lines.txt',
  [3.3539]

  [3.97660]
  + filename = love.filesystem.getUserDirectory()..'/lines.txt', -- '/' should work even on Windows