Comprehensive list of "special characters" in pdm search fields

Is there a comprehensive list of "special characters" in the 2019+ pdm search field parsing? I actually somewhat approve of the change. however, I find the documentation lacking. I have found a few sources that give examples of what you can do with some characters, but I don't have a comprehensive list of what characters need to be escaped. We have api prepopulated search cards that are failing because of the special characters. Some documentation would be nice so that we can get started on cleanup/workarounds. Worst case I guess I'll have to try every one and figure it out myself. Pardon my lack of editing. This is my first attempt at  actually asking a question on this "forum". pdm ​​​​​​​SYNKORSWYM ​​​​​​​SYNK ​​​​​​​