This is a modified version of atom-jasmine by Zachary Tamas and others. I've mostly just updated the syntax to use ES6 features, as well adding a few more snippets and making some stylistic changes, mostly removing semi-colons and defaulting to single quotes for strings.
apm install atom-jasmine-es6-snippets
Note: you'll need to reload Atom for settings to take effect
semicolon: Whether or not to add semicolons
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.