Default Order
When nav_order fields are omitted, the pages are ordered alphabetically by their titles.
By default, all Capital letters come before all lowercase letters;
you can add nav_sort: case_insensitive in the configuration file to ignore the case).
Digits precede letters, and numeric titles are ordered lexicographically:
10 precedes 2 (in contrast to explicit numeric nav_order values).
- Check that the titles of the children of this page are shown in the order:
2 10 A Aa aa
The default order of numeric titles depends on which version of Jekyll is used
to build the site:
the default build on GitHub Pages uses Jekyll 3.9 and gives lexicographic order,
but when using Jekyll 4, 2 precedes 10.