Add rustfmt configuration file

Author: kostko

.rustfmt.toml

@@ -0,0 +1,63 @@
+max_width = 100
+hard_tabs = false
+tab_spaces = 4
+newline_style = "Auto"
+use_small_heuristics = "Default"
+indent_style = "Block"
+wrap_comments = false
+format_code_in_doc_comments = false
+comment_width = 80
+normalize_comments = false
+normalize_doc_attributes = false
+format_strings = false
+format_macro_matchers = false
+format_macro_bodies = true
+empty_item_single_line = true
+struct_lit_single_line = true
+fn_single_line = false
+where_single_line = false
+imports_indent = "Block"
+imports_layout = "Mixed"
+imports_granularity = "Crate"
+reorder_imports = true
+reorder_modules = true
+reorder_impl_items = false
+type_punctuation_density = "Wide"
+space_before_colon = false
+space_after_colon = true
+spaces_around_ranges = false
+binop_separator = "Front"
+remove_nested_parens = true
+combine_control_expr = true
+overflow_delimited_expr = false
+struct_field_align_threshold = 0
+enum_discrim_align_threshold = 0
+match_arm_blocks = true
+force_multiline_blocks = false
+fn_args_layout = "Tall"
+brace_style = "SameLineWhere"
+control_brace_style = "AlwaysSameLine"
+trailing_semicolon = true
+trailing_comma = "Vertical"
+match_block_trailing_comma = false
+blank_lines_upper_bound = 1
+blank_lines_lower_bound = 0
+edition = "2015"
+version = "One"
+merge_derives = true
+use_try_shorthand = false
+use_field_init_shorthand = false
+force_explicit_abi = true
+condense_wildcard_suffixes = false
+color = "Auto"
+unstable_features = false
+disable_all_formatting = false
+skip_children = false
+hide_parse_errors = false
+error_on_line_overflow = false
+error_on_unformatted = false
+report_todo = "Never"
+report_fixme = "Never"
+ignore = []
+emit_mode = "Files"
+make_backup = false

src/lib.rs

@@ -5,14 +5,16 @@
 #[allow(unused_extern_crates)]
 extern crate rs_libc;
 
-use std::any::Any;
-use std::boxed::Box;
-use std::cell::{RefCell, UnsafeCell};
-use std::convert::TryInto;
-use std::ffi::{CStr, CString};
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::ptr::{self, NonNull};
+use std::{
+    any::Any,
+    boxed::Box,
+    cell::{RefCell, UnsafeCell},
+    convert::TryInto,
+    ffi::{CStr, CString},
+    marker::PhantomData,
+    pin::Pin,
+    ptr::{self, NonNull},
+};
 
 use impl_trait_for_tuples::impl_for_tuples;
 use thiserror::Error;