Use stable channel

Author: termoshtt

rust-toolchain

@@ -0,0 +1 @@
+stable

rustfmt.toml

@@ -2,56 +2,8 @@ max_width = 120
 hard_tabs = false
 tab_spaces = 4
 newline_style = "Unix"
-indent_style = "Block"
-use_small_heuristics = true
-format_strings = false
 wrap_comments = false
-comment_width = 100
 normalize_comments = false
-empty_item_single_line = true
-struct_lit_single_line = true
-fn_single_line = false
-where_single_line = false
-imports_indent = "Visual"
-imports_layout = "Mixed"
-reorder_extern_crates = true
-reorder_extern_crates_in_group = true
-reorder_imports = true
-reorder_imports_in_group = true
-reorder_imported_names = true
-reorder_modules = true
-binop_separator = "Front"
-type_punctuation_density = "Wide"
-space_before_colon = false
-space_after_colon = true
-spaces_around_ranges = false
-spaces_within_parens_and_brackets = false
-combine_control_expr = true
-struct_field_align_threshold = 0
-remove_blank_lines_at_start_or_end_of_block = true
-match_arm_blocks = true
-force_multiline_blocks = false
-fn_args_density = "Tall"
-brace_style = "SameLineWhere"
-control_brace_style = "AlwaysSameLine"
-trailing_comma = "Vertical"
-trailing_semicolon = true
-match_block_trailing_comma = false
-blank_lines_upper_bound = 1
-blank_lines_lower_bound = 0
 merge_derives = true
-use_try_shorthand = false
-condense_wildcard_suffixes = false
 force_explicit_abi = true
-use_field_init_shorthand = false
-write_mode = "Overwrite"
-color = "Auto"
 unstable_features = false
-disable_all_formatting = false
-skip_children = false
-hide_parse_errors = false
-error_on_line_overflow = true
-error_on_unformatted = false
-report_todo = "Never"
-report_fixme = "Never"
-ignore = []