Several of the Asciidoc headings were one level too deep inside the
"Error Handling" section. As a result, they rendered incorrectly.
It's clear from the introductory paragraph of the "Error Handling"
section that "Application Error Handling" and "System Error Handling"
should be siblings. But because the nesting level was too deep, they
were being rendered like this:
- Error Handling
- Application Error Handling
- System Error Handling
Fixing the nesting level should resolve the problem.
Resolves#1500