Fix asciidoc conversion problem for riscv#1090.

debugger_implementation.adoc

@@ -73,7 +73,7 @@ so the debugger cannot use {dmstatus-allhalted}/{dmstatus-anyhalted} to check wh
 Using the hardware single step feature is almost the same as regular
 running. The debugger just sets in before letting the hart run. The hart
 behaves exactly as in the running case, except that interrupts may be
-disabled (depending on ) and it only fetches and executes a single
+disabled (depending on {dcsr-stepie}) and it only fetches and executes a single
 instruction before re-entering Debug Mode.
 
 ==== Accessing Registers