modify defmt formatting for Cidr

src/wire/ipv4.rs

@@ -274,7 +274,7 @@ impl fmt::Display for Cidr {
 #[cfg(feature = "defmt")]
 impl defmt::Format for Cidr {
     fn format(&self, f: defmt::Formatter) {
-        defmt::write!(f, "{:?}/{=u8}", self.address, self.prefix_len);
+        defmt::write!(f, "{}/{=u8}", self.address, self.prefix_len);
     }
 }
 

src/wire/ipv6.rs

@@ -379,7 +379,6 @@ impl From<ipv4::Address> for Address {
 /// A specification of an IPv6 CIDR block, containing an address and a variable-length
 /// subnet masking prefix length.
 #[derive(Debug, Hash, PartialEq, Eq, PartialOrd, Ord, Clone, Copy, Default)]
-#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub struct Cidr {
     address: Address,
     prefix_len: u8,
@@ -444,6 +443,13 @@ impl fmt::Display for Cidr {
     }
 }
 
+#[cfg(feature = "defmt")]
+impl defmt::Format for Cidr {
+    fn format(&self, f: defmt::Formatter) {
+        defmt::write!(f, "{}/{=u8}", self.address, self.prefix_len);
+    }
+}
+
 /// A read/write wrapper around an Internet Protocol version 6 packet buffer.
 #[derive(Debug, PartialEq, Eq, Clone)]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]