Fix a "make check" failure, by restoring the dollar-1 test to its

state before a70e708 as that change is no longer needed after 2790fd6.

tests/regression/misc/dollar-1.cir

@@ -5,7 +5,7 @@ v1 1 0 dc = 0
 .control
 
 set foo = ""
-echo "TEST:" ">{$foo}< should be >{}<"
+echo "TEST:" ">{$foo}< should be ><"
 
 set foo = ( 1 2 3 )
 set bar = 2

tests/regression/misc/dollar-1.out

@@ -1,7 +1,7 @@
 
 Circuit: test for regression of already fixed bugs
 
-TEST: >{}< should be >{}<
+TEST: >< should be ><
 TEST: >1< should be >1<
 TEST: >2< should be >2<
 TEST: 1 2 3 baz bar