into 2 pieces, one for example.indexdata.com sites and one
for all other hostnames.
iframe: index-iframe-demo
index-iframe-demo:
- ( cat url.demos | perl -ne 'chomp; print qq{<h2>$$_</h2><iframe width="900px" height="600px" src="$$_"></iframe>\n}' ) > iframe-demos.html
+ ( egrep example.indexdata.com url.demos | perl -ne 'chomp; print qq{<h2>$$_</h2><iframe width="900px" height="600px" src="$$_"></iframe>\n}' ) > iframe-demos-example.html
+ ( egrep -v example.indexdata.com url.demos | perl -ne 'chomp; print qq{<h2>$$_</h2><iframe width="900px" height="600px" src="$$_"></iframe>\n}' ) > iframe-demos-other.html
tidy:
for i in iframe-demos.html index-*.html; do \