Fix strange regexp in loose parser
Fix strange regexp in loose parser

marijnh/acorn,ternjs/acorn,ternjs/acorn,marijnh/acorn,mathiasbynens/acorn,mysticatea/acorn,mysticatea/acorn,ternjs/acorn,mysticatea/acorn,marijnh/acorn,TimothyGu/acorn,mathiasbynens/acorn,TimothyGu/acorn,TimothyGu/acorn,mathiasbynens/acorn