Fix misbracketed call to isIdentifierChar.
Fix misbracketed call to isIdentifierChar.

mathiasbynens/acorn,Rich-Harris/acorn,TimothyGu/acorn,MarcelGerber/acorn,ajaxorg/acorn,marijnh/acorn,mysticatea/acorn,marijnh/acorn,Rich-Harris/acorn,mathiasbynens/acorn,MarcelGerber/acorn,mathiasbynens/acorn,ternjs/acorn,MarcelGerber/acorn,Rich-Harris/acorn,TimothyGu/acorn,mysticatea/acorn,TimothyGu/acorn,ternjs/acorn,ajaxorg/acorn,mysticatea/acorn,ajaxorg/acorn,marijnh/acorn,ternjs/acorn