Allow the PDP-11 debugger to use parentheses for sub-expressions

modules/pdp11/lib/debugger.js

@@ -89,6 +89,11 @@ function DebuggerPDP11(parmsDbg)
 
         Debugger.call(this, parmsDbg);
 
+        /*
+         * Since this Debugger doesn't use replaceRegs(), we can use parentheses instead of braces.
+         */
+        this.fParens = true;
+
         /*
          * Most commands that require an address call parseAddr(), which defaults to dbgAddrNextCode
          * or dbgAddrNextData when no address has been given.  doDump() and doUnassemble(), in turn,