rename modifier_down to key_down

Dependencies

• [2] N2NUGNN4 include a brief reference enabling many useful apps
• [3] G6OYAYHU paste in text with M-v
• [4] ETM7ENJR some helpers
• [5] HXH4AIF2 primitives for writing tests
• [6] JFFUF5AL override mouse state lookups in tests
• [7] 3HDWCPDI bugfix: include shift keys in modifier_down
• [8] ZLJGZYQG select text with shift + mouseclick
• [9] 7EQLPB3O bugfix: don't delete selection when moving cursor
• [10] 2CK5QI7W make love event names consistent
• [11] 4QQBMWLL regression: typing uppercase letters in text
• [12] JF5L2BBS test harness now supports copy/paste
• [13] PX7DDEMO autosave slightly less aggressively
• [14] AD34IX2Z couple more tests
• [15] AVTNUQYR basic test-enabled framework
• [16] H5UZI3YN editor documentation
• [*] 6LJZN727 handle chords
• [*] 3QNOKBFM beginnings of a test harness

Change contents

• replacement in reference.md at line 254
  [2.9581]→[2.9581:9713](∅→∅)
  − * `App.modifier_down(key)` -- returns `true` if the given key (doesn't

  − actually have to be just a modifier) is currently pressed.
  [2.9581]

  [2.9713]
  + * `App.key_down(key)` -- returns `true` if the given key is currently pressed.
• replacement in keychord.lua at line 37
  [3.35]→[3.1697:1763](∅→∅)
  − return App.modifier_down('lctrl') or App.modifier_down('rctrl')
  [3.35]

  [3.107]
  + return App.key_down('lctrl') or App.key_down('rctrl')
• replacement in keychord.lua at line 41
  [3.136]→[3.1764:1828](∅→∅)
  − return App.modifier_down('lalt') or App.modifier_down('ralt')
  [3.136]

  [3.206]
  + return App.key_down('lalt') or App.key_down('ralt')
• replacement in keychord.lua at line 45
  [3.237]→[3.1829:1897](∅→∅)
  − return App.modifier_down('lshift') or App.modifier_down('rshift')
  [3.237]

  [3.311]
  + return App.key_down('lshift') or App.key_down('rshift')
• replacement in keychord.lua at line 49
  [3.292]→[3.1898:1962](∅→∅)
  − return App.modifier_down('lgui') or App.modifier_down('rgui')
  [3.292]

  [3.888]
  + return App.key_down('lgui') or App.key_down('rgui')
• replacement in app.lua at line 232
  [3.2062]→[3.4495:4527](∅→∅)
  − function App.modifier_down(key)
  [3.2062]

  [3.7803]
  + function App.key_down(key)
• replacement in app.lua at line 447
  [3.3061]→[3.2263:2306](∅→∅)
  − App.modifier_down = love.keyboard.isDown
  [3.3061]

  [3.5534]
  + App.key_down = love.keyboard.isDown