zgeorgiev/Aloha-Editor — comment on commit 5fa3822dc1f651f8dc2fc4aa3ed08e42b5443aa3
File: src/plugins/common/table/lib/table-plugin.js line 298
By deliminator:

There is a mix of spaces and tabs used for indentation. The coding guidelines are hopelessly out of date, but it says that tabs should be used, not spaces (and not a mix of the tow). The indentation of the table plugin is already a mess, but we should start sticking to one style. Also, as can be seen above, github doesn't like the mix of both spaces and indentation.
http://aloha-editor.org/wiki/Coding_Guidelines