Ignore AML files and update rustfmt option name

.gitignore

@@ -1,5 +1,4 @@
 /target
 **/*.rs.bk
 Cargo.lock
-/example_os/target
-/example_os/build
+*.aml

rustfmt.toml

@@ -5,7 +5,7 @@ merge_imports = true
 imports_layout = "HorizontalVertical"
 use_field_init_shorthand = true
 use_try_shorthand = true
-format_doc_comments = true
+format_code_in_doc_comments = true
 wrap_comments = true
 max_width = 110
 comment_width = 110