Verify static resource location ends on slash

[rstoyanchev]

A location that does not end on "/" does not actually work as intended, which is probably why it hasn't been reported as an issue. We should append the slash where we can, e.g. String location values, and assert Resource locations.

[cagliostro92]

A location that does not end on "/" does not actually work as intended, which is probably why it hasn't been reported as an issue. We should append the slash where we can, e.g. String location values, and assert Resource locations.

@rstoyanchev I know this is already closed, but I'm wondering why actual code doesn't try at all to append a slash, but it simply throws an exception if the slash isn't already present.