feat(crowtty): put target after span context (#289)

This makes it easier to see the span hierarchy based on indentation
levels. This is closer to the format used by `tracing-subscriber`, so
it also makes the format more familiar for tracing users.

tools/crowtty/src/trace.rs

@@ -199,19 +199,20 @@ impl TraceWorker {
                 }
 
                 let level = DisplayLevel(meta.level);
+                write!(&mut self.textbuf, "{} {level} ", self.state.tag,).unwrap();
+
+                if self.state.write_span_cx(&mut self.textbuf) {
+                    self.textbuf.push(' ');
+                }
+
                 write!(
                     &mut self.textbuf,
-                    "{} {level} {} ",
-                    self.state.tag,
-                    format_args!("{target}:")
+                    "{}",
+                    format_args!("{target}: ")
                         .if_supports_color(Stream::Stdout, |target| target.dimmed())
                 )
                 .unwrap();
 
-                if self.state.write_span_cx(&mut self.textbuf) {
-                    self.textbuf.push(' ');
-                }
-
                 let SerializeRecordFields::De(ref fields) = fields else {
                     unreachable!("we are deserializing!");
                 };
@@ -347,17 +348,17 @@ impl FormatState {
             repr,
             ..
         } = span;
+        write!(textbuf, "{} {level} ", self.tag).unwrap();
+
+        self.write_span_cx(textbuf);
+
         write!(
             textbuf,
-            "{} {level} {} ",
-            self.tag,
-            format_args!("{}:", target).if_supports_color(Stream::Stdout, |target| target.dimmed())
+            "{repr}{target} {tag} ({id:04})",
+            target = format_args!(": {}:", target)
+                .if_supports_color(Stream::Stdout, |target| target.dimmed())
         )
         .unwrap();
-
-        self.write_span_cx(textbuf);
-
-        write!(textbuf, "{repr} {tag} ({id:04})").unwrap();
     }
 
     fn write_span_cx(&self, textbuf: &mut String) -> bool {