openpgp: Apply clippy::manual_map.

  - Improve clarity by replacing

    match Some(0) {
      Some(x) => Some(x + 1),
      None => None,
    };

    with Some(0).map(|x| x + 1);

1 files changed, 1 insertions, 5 deletions

diff --git a/openpgp/src/parse/partial_body.rs b/openpgp/src/parse/partial_body.rs
index e0904869..0ae9bad4 100644
--- a/openpgp/src/parse/partial_body.rs
+++ b/openpgp/src/parse/partial_body.rs
@@ -59,11 +59,7 @@ impl<T: BufferedReader<Cookie>> std::fmt::Debug
             .field("last", &self.last)
             .field("hash headers", &self.hash_headers)
             .field("buffer (bytes left)",
-                   &if let Some(ref buffer) = self.buffer {
-                       Some(buffer.len())
-                   } else {
-                       None
-                   })
+                   &self.buffer.as_ref().map(|buffer| buffer.len()))
             .field("reader", &self.reader)
             .finish()
     }