Configure rustfmt.

rustfmt.toml

@@ -1,8 +1,13 @@
-max_width = 80
-ideal_width = 80
-fn_call_width = 80
-force_explicit_abi = false
-fn_single_line = true
+edition = "2018"
 fn_args_density = "Compressed"
+fn_single_line = true
+match_arm_blocks = false
 match_block_trailing_comma = true
-normalize_comments = false
+max_width = 100
+merge_imports = true
+newline_style = "Unix"
+reorder_imports = true
+trailing_comma = "Vertical"
+use_field_init_shorthand = true
+use_try_shorthand = true
+wrap_comments = true