git-trailers: improve usage of OwnedTrailer

OwnedTrailer was lacking a Debug impl and access to its values.

Add a Debug derivation for OwnedTrailer and OwnedToken. Make token and
values public. Add Deref implementation for OwnedToken.

Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett

git-trailers/src/lib.rs

@@ -45,11 +45,13 @@ pub struct Token<'a>(&'a str);
 
 /// A version of the Trailer<'a> which owns it's token and values. Useful for
 /// when you need to carry trailers around in a long lived data structure.
+#[derive(Debug)]
 pub struct OwnedTrailer {
-    token: OwnedToken,
-    values: Vec<String>,
+    pub token: OwnedToken,
+    pub values: Vec<String>,
 }
 
+#[derive(Debug)]
 pub struct OwnedToken(String);
 
 impl<'a> From<&Trailer<'a>> for OwnedTrailer {
@@ -76,6 +78,14 @@ impl<'a> From<&'a OwnedTrailer> for Trailer<'a> {
     }
 }
 
+impl Deref for OwnedToken {
+    type Target = str;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
 #[derive(Debug, Error)]
 #[non_exhaustive]
 pub enum InvalidToken {