Tab key sequence isn't quite correct sometimes

[chmanie]

In some cases I get a weird behavior, when pressing tab to autocomplete. E.g. when defining a function inside a function instead of autocompleting 'fu' to

function methodName (arguments) {
    // body...
}

when pressing the 'tab' key it jumps to the end of the outer function. Same with BDD 'description' and 'it'. I hope you can reproduce the bug. I'm going to issue a pull request later fixing this (but maybe it's a desired behavior, since no one else seems to have recognized it so far?).

[zenorocha]

Fixed #11