fasta/record/sequence/complement: Print invalid base as a byte string

The previous message incorrectly printed the invalid base without a hex
prefix. Instead of printing all characters in hex, this now prints the debug
output of a byte string, i.e., printable characters are shown normally
and non-printable characters are escaped.

See COMBINE-lab/simpleaf#137.

noodles-fasta/Cargo.toml

@@ -14,6 +14,7 @@ documentation = "https://docs.rs/noodles-fasta"
 async = ["dep:tokio"]
 
 [dependencies]
+bstr.workspace = true
 bytes.workspace = true
 memchr.workspace = true
 noodles-bgzf = { path = "../noodles-bgzf", version = "0.30.0" }

noodles-fasta/src/record/sequence/complement.rs

@@ -2,6 +2,8 @@
 
 use std::{error, fmt, iter::FusedIterator, slice};
 
+use bstr::ByteSlice;
+
 /// An iterator that returns the complement of a sequence.
 pub struct Complement<'a> {
     iter: slice::Iter<'a, u8>,
@@ -21,7 +23,8 @@ impl error::Error for ComplementError {}
 
 impl fmt::Display for ComplementError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "invalid base: {:04x?}", self.0)
+        let bytes = [self.0];
+        write!(f, "invalid base: {:?}", bytes.as_bstr())
     }
 }