tweak skip

Author: hjwp

chapter_19_mocking.asciidoc

@@ -1970,7 +1970,7 @@ to get a working login system without this one.
 Just as we do on the server, you can also use a _.env_ file to save
 project-specific environment variables:
 
-[role="skip"]
+[role="skipme"]
 [subs="specialcharacters,quotes"]
 ----
 $ *echo .env >> .gitignore*  # we don't want to commit our secrets into git!