fix bug 1198893 - Handle {{xref_cssnumber}}
fix bug 1198893 - Handle {{xref_cssnumber}}

jwhitlock/web-platform-compat,mdn/browsercompat,renoirb/browsercompat,mdn/browsercompat,jwhitlock/web-platform-compat,renoirb/browsercompat,renoirb/browsercompat,jwhitlock/web-platform-compat,mdn/browsercompat