fix url of example page
correct "icon-contract" with "icon-collapse"

It should be "icon-collapse".
Merge pull request #19 from bachue/patch-1

correct "icon-contract" with "icon-collapse"
Fix indentation for level 6 and up
Merge pull request #22 from DanEEStar/patch-1

Fix indentation for level 6 and up
A few minor changes...
Merge branch 'master' into gh-pages