Fix extension handling.
Fix extension handling.

cgvarela/handlebars_assets,leshill/handlebars_assets,tjgrathwell/handlebars_assets,leshill/handlebars_assets,tjgrathwell/handlebars_assets,ksteigerwald/handlebars_assets,cgvarela/handlebars_assets,ksteigerwald/handlebars_assets,wideopenspaces/handlebars_assets,envato/handlebars_assets,envato/handlebars_assets,wideopenspaces/handlebars_assets