remove the role :exc:

matrixise · matrixise · commit 8b69437b23f4 · 2018-10-25T16:19:09.000+02:00
diff --git a/Doc/whatsnew/3.6.rst b/Doc/whatsnew/3.6.rst
@@ -1200,7 +1200,7 @@ importlib
 
 Import now raises the new exception :exc:`ModuleNotFoundError`
 (subclass of :exc:`ImportError`) when it cannot find a module.  Code
-that current checks for :exc:`ImportError` in try-except) will still work.
+that current checks for ``ImportError`` (in try-except) will still work.
 (Contributed by Eric Snow in :issue:`15767`.)
 
 :class:`importlib.util.LazyLoader` now calls
