Use .iter() instead of .into_iter()

Just call the .iter() method instead of .into_iter() when either is
OK. The shorter form is shorter and should thus be easier to read.

Found by clippy lint into_iter_on_ref:
https://rust-lang.github.io/rust-clippy/master/index.html#into_iter_on_ref

2 files changed, 3 insertions, 3 deletions

diff --git a/openpgp/src/packet/signature/subpacket.rs b/openpgp/src/packet/signature/subpacket.rs
index f71647d5..558d3f9c 100644
--- a/openpgp/src/packet/signature/subpacket.rs
+++ b/openpgp/src/packet/signature/subpacket.rs
@@ -6869,7 +6869,7 @@ impl signature::SignatureBuilder {
         where T: AsRef<[Fingerprint]>
     {
         self.hashed_area.remove_all(SubpacketTag::IntendedRecipient);
-        for fp in recipients.as_ref().into_iter() {
+        for fp in recipients.as_ref().iter() {
             self.hashed_area.add(
                 Subpacket::new(SubpacketValue::IntendedRecipient(fp.clone()), false)?)?;
         }
diff --git a/openpgp/src/types/key_flags.rs b/openpgp/src/types/key_flags.rs
index 292afb6a..03bf9f1f 100644
--- a/openpgp/src/types/key_flags.rs
+++ b/openpgp/src/types/key_flags.rs
@@ -113,7 +113,7 @@ impl BitAnd for &KeyFlags {
         let r = rhs.as_slice();
 
         let mut c = Vec::with_capacity(std::cmp::min(l.len(), r.len()));
-        for (l, r) in l.into_iter().zip(r.into_iter()) {
+        for (l, r) in l.iter().zip(r.iter()) {
             c.push(l & r);
         }
 
@@ -136,7 +136,7 @@ impl BitOr for &KeyFlags {
         };
 
         let mut l = l.to_vec();
-        for (i, r) in r.into_iter().enumerate() {
+        for (i, r) in r.iter().enumerate() {
             l[i] |= r;
         }