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/guide/src/chapter_03.md b/guide/src/chapter_03.md
index 19a42147..d661f7b9 100644
--- a/guide/src/chapter_03.md
+++ b/guide/src/chapter_03.md
@@ -201,7 +201,7 @@ fn main() {
     let mut buf = vec![0; 1024 * 1024];
 
     let mut ppr = PacketParser::from_bytes(MESSAGE.as_bytes()).unwrap();
-    while let PacketParserResult::Some(mut pp) = ppr {
+    while let Ok(mut pp) = ppr {
         // Match on the kind of packet here while it is in the parser.
         if let openpgp::Packet::Literal(_) = pp.packet {
             // Stream the content of the literal packet.