I have merged a few duplicate topics into this Feature Request thread.
I have also modified the title of this feature request to Expand Pool of Special Characters Available in Password Generator (was: “Password Generator Should Have More Character Set”). This makes the current thread more specific, and distinguishes it from the related (but different) feature request “Filter special characters in generated passwords per login”, which seeks to restrict the special characters used by the generator.
Note to Mods: Some related proposals and discussions can also be found in the thread “More Password Generator Enhancements (Comprehensive List)”, which was created by merging various unrelated enhancement requets. I would strongly advice against merging the current thread into that catch-all thread, because it makes dicussion and voting confusing.