update docs

docs/sat.md

@@ -181,7 +181,7 @@ In the example above, we are telling manta we want Alps to use the ansible in re
 
 Manta can expand the variables in the template file with a vars file or through CLI
 
-### the __DATE__ wildcard
+### the `__DATE__` wildcard
 
 Since configurations are immutable in manta, having to change the vars file to update the version may be painful to deal with (specially during development), if this is the case, then manta has a special wildcard `__DATE__` to simplify this process.