Pseudocode: don't write full label name when jump on it

compiler/testData/cfg-variables/lexicalScopes/whileScope.instructions

@@ -20,7 +20,7 @@ L6 [condition entry point]:
 L4 [body entry point]:
   3 mark({ val a: Int })
     v(val a: Int)                                             INIT: in: {} out: {a=D}
-  2 jmp(L2 [loop entry point])                                INIT: in: {} out: {}       USE: in: {} out: {}
+  2 jmp(L2)                                                   INIT: in: {} out: {}       USE: in: {} out: {}
 L3 [loop exit point]:
 L5 [body exit point]:
 -   read (Unit)
@@ -32,4 +32,4 @@ error:
     <ERROR>
 sink:
     <SINK>                                                                               USE: in: {} out: {}
-=====================
+=====================