Cleanups: Add comments to ease code understanding
Typo
Docs: Expand non-conformance notes for PHP format
Docs: Replace formats supported section with link to PHP format docs
Fix: Reset prename when exiting the array

Perhaps several (not nested) arrays are declared in the same file, or
perhaps the file has mixed dialects for setting the localization strings.
Cleanups
Docs: Add more non-conformance cases for PHP format
Detect whether Android resource string unit is translatable

There is XML element for indicating this.