angularjs fails to parse "( aaa, bbb) in xxx" (extra space before "aaa") in ngRepeat value

[davidmichaelkarr]

I noticed that an ngRepeat value of "( aaa, bbb) in xxx" or "(aaa, bbb ) in xxx" fails to parse.

It results in an error like the following:
Error: [ngRepeat:iidexp] 'item' in 'item in collection' should be an identifier or > '(key, value)' expression, but got '( aaa, bbb)'.

I've been told that the regexp that validates this string is the following:

^(?:([$\w]+)|(([$\w]+)\s_,\s_([$\w]+)))$

In the interest of completeness and "least surprise", this regexp (along with any corresponding required code) should be changed to include "\s*" before the key and after the value.