Fix specification directory index

doc/htaccess.in

@@ -13,7 +13,7 @@ RewriteCond %{HTTP_ACCEPT} !application/rdf\+xml.*(text/html|application/xhtml\+
 RewriteCond %{HTTP_ACCEPT} text/html [OR]
 RewriteCond %{HTTP_ACCEPT} application/xhtml\+xml [OR]
 RewriteCond %{HTTP_USER_AGENT} ^Mozilla/.*
-RewriteRule ^([^.]*)$ $1.html [L]
+RewriteRule ^([^.]+)$ $1.html [L]
 
 # Rewrite rule to serve Turtle content from the vocabulary URI if requested
 RewriteCond %{HTTP_ACCEPT} text/turtle [OR]
@@ -21,4 +21,5 @@ RewriteCond %{HTTP_ACCEPT} application/x-turtle
 RewriteRule ^([^.]*)$ $1.ttl [L]
 
 # Serve HTML page by default
-RewriteRule ^([^.]*)$ $1.html [L]
+RewriteRule ^$ index.html [L]
+RewriteRule ^([^.]+)$ $1.html [L]