TextBuffer.on is deprecated.

[rochacbruno]

Use TextBuffer::onDidSave instead. A TextBuffer instance is no longer provided as a callback argument.

TextBuffer.on (/usr/share/atom/resources/app.asar/node_modules/text-buffer/lib/text-buffer.js:1295:16)
<unknown> (/home/rochacbruno/.atom/packages/flake8/lib/flake8.coffee:121:24)
Workspace.eachEditor (/usr/share/atom/resources/app.asar/src/workspace.js:969:9)
<unknown> (/home/rochacbruno/.atom/packages/flake8/lib/flake8.coffee:120:23)
Config.observeKeyPath (/usr/share/atom/resources/app.asar/src/config.js:555:7)
Config.observe (/usr/share/atom/resources/app.asar/src/config.js:135:21)