It turns out Liquid throws an error when you write `{% if {{ include.url }} %}` instead of `{% if {{include.url}} %}`. I updated the examples here to omit the spacing. To avoid inconsistency, I just omitted the spacing from all curly braces. Also added a note explaining the issue and put the blame on Liquid.
- made updates from Parkr's review
- update to Extensionless permalinks section
- update to note about not using built-in perm styles in front matter
- update for readability in places
When running 'script/stackprof object', I noticed that it would be helpful to see
GC information. It appears we create a lot of junk -- a source of optimization if
we decide to go down that path.
An average Jekyll build doesn't run a GC, but auto-regeneration likely would eventually
require a GC run and it would be interesting to see if we can reduce how much we throw
away with each call to 'site.process'.
It turns out Liquid throws an error when you write `{% if {{ include.url }} %}` instead of `{% if {{include.url}} %}`. I updated the examples here to omit the spacing. To avoid inconsistency, I just omitted the spacing from all curly braces. Also added a note explaining the issue and put the blame on Liquid.
I added a documentation page on how to build navigation for your site. This topic is primarily intended for users who have a lot of pages on their site (such as for documentation websites), and want to build a more robust sidebar navigation.
Jekyll combines Liquid with YAML in interesting ways that aren't really documented clearly in the existing docs, except for a brief reference [here](http://jekyllrb.com/docs/datafiles/#the-data-folder). You can read about Liquid on Shopify and YAML in YAML's docs, but exactly how you store YAML files in a Jekyll project and iterate through them using Liquid loops and filters to generate lists of pages is something that isn't clear to a lot of people. (You can see origins of these questions in [previous help issues](https://github.com/jekyll/jekyll-help/issues/266).) The documentation on navigation would fit well into the Jekyll docs.