Improves nested triples formatting

lib/src/model/triple.rs

@@ -131,7 +131,7 @@ impl fmt::Display for SubjectRef<'_> {
             Self::BlankNode(node) => node.fmt(f),
             Self::Triple(triple) => write!(
                 f,
-                "<< {} {} {} >>",
+                "<<{} {} {}>>",
                 triple.subject, triple.predicate, triple.object
             ),
         }
@@ -373,7 +373,7 @@ impl fmt::Display for TermRef<'_> {
             Self::Triple(triple) => {
                 write!(
                     f,
-                    "<< {} {} {} >>",
+                    "<<{} {} {}>>",
                     triple.subject, triple.predicate, triple.object
                 )
             }

lib/src/sparql/csv_results.rs

@@ -166,13 +166,13 @@ fn write_tsv_term<'a>(term: impl Into<TermRef<'a>>, sink: &mut impl Write) -> io
             _ => sink.write_all(literal.to_string().as_bytes()),
         },
         TermRef::Triple(triple) => {
-            sink.write_all(b"<< ")?;
+            sink.write_all(b"<<")?;
             write_tsv_term(&triple.subject, sink)?;
             sink.write_all(b" ")?;
             write_tsv_term(&triple.predicate, sink)?;
             sink.write_all(b" ")?;
             write_tsv_term(&triple.object, sink)?;
-            sink.write_all(b" >>")?;
+            sink.write_all(b">>")?;
             Ok(())
         }
     }