Fix fmt warnings
Fixed FMT warnings. Rust-fmt changed the name of the one option and how to call them.
@@ -19,7 +19,8 @@ space_before_colon = false
struct_lit_single_line = true
use_field_init_shorthand = true
use_try_shorthand = true
-format_doc_comments = true
+unstable_features = true
+format_code_in_doc_comments = true
where_single_line = true
wrap_comments = true
overflow_delimited_expr = true
