Update test output of print018

It seems that “Use bindLocalNamesFV in rn_inst_info” makes some names
nicer in the debugger output.

testsuite/tests/ghci.debugger/scripts/print018.stdout

-Breakpoint 0 activated at ..\Test.hs:40:1-17
-Stopped at ..\Test.hs:40:1-17
+Breakpoint 0 activated at ../Test.hs:40:1-17
+Stopped at ../Test.hs:40:1-17
 _result :: () = _
-Stopped at ..\Test.hs:40:10-17
+Stopped at ../Test.hs:40:10-17
 _result :: () = _
-x :: a17 = _
-x = (_t1::a17)
-x :: a17
+x :: a = _
+x = (_t1::a)
+x :: a
 ()
 x = Unary
 x :: Unary