bugfix

Dependencies

• [2] 3ZYCPNQY clearer copy
• [3] KOYAJWE4 extract a couple more methods
• [4] SVJZZDC3 snapshot - no, that's all wrong
• [5] V5MJRFOZ bugfix: down arrow doesn't scroll up unnecessarily
• [6] ZPUQSPQP extract a few methods
• [7] CBPV5SSI stop handling nil screen_line_starting_pos everywhere
• [*] BULPIBEG beginnings of a module for the text editor
• [*] GN3IF4WF bugfix: pasting newlines
• [*] BJ5X5O4A let's prevent the text cursor from ever getting on a drawing

Change contents

• edit in text.lua at line 358
  [10.602]

  [10.602]
  + Lines[Cursor1.line].screen_line_starting_pos = nil

  + Lines[Cursor1.line+1].fragments = nil

  + Lines[Cursor1.line+1].screen_line_starting_pos = nil
• replacement in text.lua at line 416
  [3.152]→[3.152:200](∅→∅)
  − --? print('up', Cursor1.pos, Screen_top1.pos)
  [3.152]

  [3.200]
  + --? print('up', Cursor1.line, Cursor1.pos, Screen_top1.line, Screen_top1.pos)
• edit in Manual_tests.md at line 14
  [2.188]
  +

  + * Some ADT/interface support would be helpful in keeping per-line state in

  + sync. Any change to line data should clear line `fragments` and

  + `screen_line_starting_pos`.