openpgp: Make PacketParserResult a std::result::Result.

  - This avoids the partial implementation imitating
    std::option::Option, replacing it with std::result::Result.

  - As a benefit, std::result::Result is in the prelude, simplifying a
    lot of parsing loops.

1 files changed, 1 insertions, 1 deletions

diff --git a/openpgp/src/crypto/s2k.rs b/openpgp/src/crypto/s2k.rs
index 8dff4693..40a26bda 100644
--- a/openpgp/src/crypto/s2k.rs
+++ b/openpgp/src/crypto/s2k.rs
@@ -416,7 +416,7 @@ mod tests {
 
             // Get the next packet.
             let (_, ppr) = pp.next().unwrap();
-            assert!(ppr.is_none());
+            assert!(ppr.is_err());
         }
     }