Fix backticks

Author: matthiasgoergens

pep-0007.txt

@@ -36,7 +36,7 @@ C dialect
   The public C API should be compatible with C++.
 
 * Python versions up to and including 3.11 tacitly allowed signed arithmetic
-  overflow (wrapping around using twos-complement representation) via the `-fwrapv` compiler option.
+  overflow (wrapping around using twos-complement representation) via the ``-fwrapv`` compiler option.
 
 * Python 3.6 to 3.10 use C89 with several select C99 features: