docstring

Author: MarcoGorelli

pandas/_libs/tslibs/parsing.pyx

@@ -1108,6 +1108,7 @@ cdef str _fill_token(token: str, padding: int):
     return token_filled
 
 cdef void _maybe_warn_about_dayfirst(format: str, bint dayfirst):
+    """Warn if guessed datetime format doesn't respect dayfirst argument."""
     cdef:
         int day_index = format.find('%d')
         int month_index = format.find('%m')