Documentation improvements

src/securejoin.rs

@@ -1,7 +1,5 @@
 //! Verified contact protocol implementation as [specified by countermitm project](https://countermitm.readthedocs.io/en/stable/new.html#setup-contact-protocol).
 
-#![allow(missing_docs)]
-
 use std::convert::TryFrom;
 
 use anyhow::{bail, Context as _, Error, Result};
@@ -35,6 +33,7 @@ use qrinvite::QrInvite;
 
 use crate::token::Namespace;
 
+/// Set of characters to percent-encode in email addresses and names.
 pub const NON_ALPHANUMERIC_WITHOUT_DOT: &AsciiSet = &NON_ALPHANUMERIC.remove(b'.');
 
 macro_rules! inviter_progress {