41c529c602
When we talk about the PTI, we tend to say "PTI". In fact, the original filename is "reference/project-testing-interface.rst". However, the pre-language files use the cti acronym, as do all of the title lines. Let's align with the acronym people use when discussing the concept. Also, remove the suffix from the language files - they're in a directory called "pti" already, they don't need a _pti suffix. Change-Id: I53bc82eb2cb2125d7446a5f7d0be622118553732