make sure helpers return strict string

[dead-horse]

not sure if this is look good to everyone, but it reduce lots of code like:

(this.charset || '').toLowerCase();
(this.get('ua') || '').indexOf('chrome');
(this.type || '').match(/^text/);

and this won't break your app if your are using !this.get('referer') etc.

[jonathanong]

LGTM. can't see any possible breaking changes. anyone else?

[targos]

LGTM but I think there are missing return ''; in request.get(field)

[juliangruber]

LGTM

[juliangruber]

Strictly it's still a breaking change because we didn't tell people to use lose equality checks, if someone is strictly comparing typeof this.get('referer') === 'undefined' it breaks. i'm not sure though if someone does that even.

[fengmk2]

LGTM

[tj]

👍

[dead-horse]

0.20.0 ?

[jonathanong]

go for it!