[merge addon] Lazily initialize diff_match_patch
[merge addon] Lazily initialize diff_match_patch

hackmdio/CodeMirror,dperetti/CodeMirror,MarcelGerber/CodeMirror,jayaprabhakar/CodeMirror,nightwing/CodeMirror,ficristo/CodeMirror,pabloferz/CodeMirror,jayaprabhakar/CodeMirror,MarcelGerber/CodeMirror,dperetti/CodeMirror,thomasjm/CodeMirror,mtaran-google/CodeMirror,mtaran-google/CodeMirror,namin/CodeMirror,notepadqq/CodeMirror,namin/CodeMirror,hackmdio/CodeMirror,wingify/CodeMirror,jkaplon/CodeMirror,wingify/CodeMirror,nightwing/CodeMirror,ficristo/CodeMirror,notepadqq/CodeMirror,hackmdio/CodeMirror,pabloferz/CodeMirror,mtaran-google/CodeMirror,MarcelGerber/CodeMirror,codio/CodeMirror,codio/CodeMirror,pabloferz/CodeMirror,jkaplon/CodeMirror,nightwing/CodeMirror,ficristo/CodeMirror,thomasjm/CodeMirror,jayaprabhakar/CodeMirror,codio/CodeMirror,notepadqq/CodeMirror,SidPresse/CodeMirror,thomasjm/CodeMirror,jkaplon/CodeMirror,SidPresse/CodeMirror,wingify/CodeMirror,SidPresse/CodeMirror,namin/CodeMirror,dperetti/CodeMirror