default.html.erb in scholarmarkdown-1.4.0

- old
+ new
@@ -3,9 +3,10 @@
 <head>
   <meta charset="utf-8" />
   <title><%= h @item[:title] %></title>
   <link rel="stylesheet" media="screen" href="styles/screen.css" />
   <link rel="stylesheet" media="print"  href="styles/print.css" />
+  <%= @items['/styles/katex.css'].nil? ? '' : '<link rel="stylesheet" media="all"    href="styles/katex.css">' %>
 </head>
 <body prefix="cc: https://creativecommons.org/ns# rdfs: http://www.w3.org/2000/01/rdf-schema#">
   <%= yield %>
 </body about="" prefix="rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns# rdfs: http://www.w3.org/2000/01/rdf-schema# owl: http://www.w3.org/2002/07/owl# xsd: http://www.w3.org/2001/XMLSchema# dcterms: http://purl.org/dc/terms/ dctypes: http://purl.org/dc/dcmitype/ foaf: http://xmlns.com/foaf/0.1/ v: http://www.w3.org/2006/vcard/ns# pimspace: http://www.w3.org/ns/pim/space# cc: https://creativecommons.org/ns# skos: http://www.w3.org/2004/02/skos/core# prov: http://www.w3.org/ns/prov# qb: http://purl.org/linked-data/cube# schema: http://schema.org/ void: http://rdfs.org/ns/void# rsa: http://www.w3.org/ns/auth/rsa# cert: http://www.w3.org/ns/auth/cert# cal: http://www.w3.org/2002/12/cal/ical# wgs: http://www.w3.org/2003/01/geo/wgs84_pos# org: http://www.w3.org/ns/org# biblio: http://purl.org/net/biblio# bibo: http://purl.org/ontology/bibo/ book: http://purl.org/NET/book/vocab# ov: http://open.vocab.org/terms/ sioc: http://rdfs.org/sioc/ns# doap: http://usefulinc.com/ns/doap# dbr: http://dbpedia.org/resource/ dbp: http://dbpedia.org/property/ sio: http://semanticscience.org/resource/ opmw: http://www.opmw.org/ontology/ deo: http://purl.org/spar/deo/ doco: http://purl.org/spar/doco/ cito: http://purl.org/spar/cito/ fabio: http://purl.org/spar/fabio/ oa: http://www.w3.org/ns/oa# as: https://www.w3.org/ns/activitystreams# ldp: http://www.w3.org/ns/ldp# solid: http://www.w3.org/ns/solid/terms# acl: http://www.w3.org/ns/auth/acl# dio: https://w3id.org/dio#" typeof="schema:CreativeWork sioc:Post prov:Entity">
 </html>