tc: man: Fix incorrect parameter format in prio.

Parameter priomap use blank instead of comma to separate bands,
update manpage to confirms to this.

man/man8/tc-prio.8

@@ -11,7 +11,7 @@ major:
 .B ] prio [ bands 
 bands
 .B ] [ priomap
-band,band,band... 
+band band band...
 .B ] [ estimator 
 interval timeconstant
 .B ]
@@ -134,7 +134,7 @@ showing to which Priority they are mapped.
 The last column shows the result of the default priomap. On the command line,
 the default priomap looks like this:
 
-    1, 2, 2, 2, 1, 2, 0, 0 , 1, 1, 1, 1, 1, 1, 1, 1
+    1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1
 
 This means that priority 4, for example, gets mapped to band number 1.
 The priomap also allows you to list higher priorities (> 7) which do not