agent: use in-use instead of inuse for consistency

Since I renamed these fields in the previous commit, let's take this
opportunity to be consistent with the other fields containing 'in use'.

Signed-off-by: Mahe Tardy <[email protected]>

Author: mtardy

agent/agent.go

@@ -229,9 +229,9 @@ func handle(conn io.ReadWriter, msg []byte) error {
 		fmt.Fprintf(conn, "heap-objects: %v\n", s.HeapObjects)
 		fmt.Fprintf(conn, "stack-in-use: %v\n", formatBytes(s.StackInuse))
 		fmt.Fprintf(conn, "stack-sys: %v\n", formatBytes(s.StackSys))
-		fmt.Fprintf(conn, "mspan-inuse: %v\n", formatBytes(s.MSpanInuse))
+		fmt.Fprintf(conn, "mspan-in-use: %v\n", formatBytes(s.MSpanInuse))
 		fmt.Fprintf(conn, "mspan-sys: %v\n", formatBytes(s.MSpanSys))
-		fmt.Fprintf(conn, "mcache-inuse: %v\n", formatBytes(s.MCacheInuse))
+		fmt.Fprintf(conn, "mcache-in-use: %v\n", formatBytes(s.MCacheInuse))
 		fmt.Fprintf(conn, "mcache-sys: %v\n", formatBytes(s.MCacheSys))
 		fmt.Fprintf(conn, "other-sys: %v\n", formatBytes(s.OtherSys))
 		fmt.Fprintf(conn, "gc-sys: %v\n", formatBytes(s.GCSys))