Complete the set of traits that string types implement

[tomprogrammer]

From the documentation of std::string::String following traits could/should be implemented for ascii strings:

• FromIterator
• Extend
• Pattern (tracked in Implement std::str::pattern::Pattern #53)
• Default
• Add
• Index (both AsciiString and AsciiStr)
• Write (PR Impl fmt::Write for AsciiString, and add tests #33)
• More inherent methods on AsciiString

[tormol]

String doesn't implement Write, and implementing Pattern is unstable.

Are you waiting for Pattern to become stable?

[tomprogrammer]

I've meant std::fmt::Write which is now implemented in the contributed PR #33. I will have to check how to proceed with Pattern since it's unstable right now.

[tomprogrammer]

The Pattern trait will be tracked in #53.