tpl: Fix Unix time test case in TestDateFormat()
tpl: Fix Unix time test case in TestDateFormat()

Fixes #2855

digitalcraftsman/hugo,mdhender/hugo,anthonyfok/hugo,digitalcraftsman/hugo,fedelibre/hugo,gohugoio/hugo,tubo028/hugo,tubo028/hugo,mdhender/hugo,anthonyfok/hugo,mdhender/hugo,MarkDBlackwell/hugo,mitchchn/hugo,fedelibre/hugo,gohugoio/hugo,MarkDBlackwell/hugo,mitchchn/hugo,gohugoio/hugo,mdhender/hugo,fedelibre/hugo,fedelibre/hugo,anthonyfok/hugo