refactor: hide pgp module from public API

src/key.rs

@@ -260,7 +260,7 @@ pub(crate) async fn load_keypair(
     })
 }
 
-/// Use of a [KeyPair] for encryption or decryption.
+/// Use of a key pair for encryption or decryption.
 ///
 /// This is used by [store_self_keypair] to know what kind of key is
 /// being saved.

src/keyring.rs

@@ -44,10 +44,6 @@ where
         self.keys.push(key);
     }
 
-    pub fn len(&self) -> usize {
-        self.keys.len()
-    }
-
     pub fn is_empty(&self) -> bool {
         self.keys.is_empty()
     }

src/lib.rs

@@ -79,7 +79,7 @@ pub mod mimeparser;
 pub mod oauth2;
 mod param;
 pub mod peerstate;
-pub mod pgp;
+mod pgp;
 pub mod provider;
 pub mod qr;
 pub mod qr_code_generator;

src/pgp.rs

@@ -24,7 +24,8 @@ use crate::keyring::Keyring;
 use crate::tools::EmailAddress;
 
 #[allow(missing_docs)]
-pub const HEADER_AUTOCRYPT: &str = "autocrypt-prefer-encrypt";
+#[cfg(test)]
+pub(crate) const HEADER_AUTOCRYPT: &str = "autocrypt-prefer-encrypt";
 
 #[allow(missing_docs)]
 pub const HEADER_SETUPCODE: &str = "passphrase-begin";