f - address review comments

Author: jkczyz

lightning/src/routing/gossip.rs

@@ -929,7 +929,7 @@ impl_writeable_tlv_based!(NodeAnnouncementInfo, {
 ///
 /// [security considerations]: https://github.com/lightning/bolts/blob/master/07-routing-gossip.md#security-considerations-for-node-aliases
 #[derive(Clone, Debug, PartialEq)]
-pub struct NodeAlias([u8; 32]);
+pub struct NodeAlias(pub [u8; 32]);
 
 impl fmt::Display for NodeAlias {
 	fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
@@ -944,7 +944,7 @@ impl fmt::Display for NodeAlias {
 			},
 			Err(_) => {
 				bytes.iter().map(|b| *b as char)
-					.map(|c| if c.is_ascii_graphic() || c == ' ' { c } else { control_symbol })
+					.map(|c| if c >= '\x20' && c <= '\x7e' { c } else { control_symbol })
 					.collect::<String>()
 			},
 		};