fault.py: adhere to ruff formatting

Author: hvasbath

beat/ffi/fault.py

@@ -1046,7 +1046,7 @@ def get_template(nsubfaults):
 #     [km]    [km]     [m]     [m]     [m]
 #-------------------------------------------------------------------------------
 """
-        return (template % nsubfaults).encode('ascii')
+        return (template % nsubfaults).encode("ascii")
 
     # get slip components from result point
     uparr = point["uparr"]