difference in implementation of inspect() between libsass and sass

[Reasonable-Solutions]

with libsass, type-of(inspect(white)) returns color but with sass it returns string. I am guessing string is the desired result.

see this https://gist.github.com/CHedgren/048b98d1655ea6835e4c

// ----
// libsass (v3.2.5)
// ----

div:after {
content: type-of(inspect(white));
}

outputs:

div:after {
content: color;
}

whereas I expected

div:after {
content: string;
}

[chriseppstein]

inspect should always return a string.

[mgreter]

Duplicate of #1281