2.1.50 [ECMA-262/5] Section 15.10.2.17, ClassAtom
V0086:
The specification states:
The production ClassAtom :: - evaluates by returning the CharSet containing the one character -. The production ClassAtom :: ClassAtomNoDash evaluates by evaluating ClassAtomNoDash to obtain a CharSet and returning that CharSet.
IE9 Mode and IE10 Mode (All Versions)
The production ClassAtom :: - evaluates by returning the CharSet containing the one character -.
The production ClassAtom :: ClassAtomNoDash evaluates by evaluating ClassAtomNoDash to obtain a CharSet and returning that CharSet.
The production ClassAtomInRange :: - evaluates by returning the CharSet containing the one character -.
The production ClassAtomInRange :: ClassAtomNoDashInRange evaluates by evaluating ClassAtomNoDashInRange to obtain a CharSet and returning that CharSet.