refactor/wc ~ polish spelling (comments, names, and exceptions)

src/uu/wc/src/wc.rs

@@ -5,17 +5,15 @@
 //  * For the full copyright and license information, please view the LICENSE
 //  * file that was distributed with this source code.
 
-// spell-checker:ignore (ToDO) fpath
-
 #[macro_use]
 extern crate uucore;
 
 mod count_bytes;
 mod countable;
-mod wordcount;
+mod word_count;
 use count_bytes::count_bytes_fast;
 use countable::WordCountable;
-use wordcount::{TitledWordCount, WordCount};
+use word_count::{TitledWordCount, WordCount};
 
 use clap::{App, Arg, ArgMatches};
 use thiserror::Error;

src/uu/wc/src/word_count.rs

@@ -123,7 +123,7 @@ impl WordCount {
 /// This struct supplements the actual word count with an optional title that is
 /// displayed to the user at the end of the program.
 /// The reason we don't simply include title in the `WordCount` struct is that
-/// it would result in unneccesary copying of `String`.
+/// it would result in unnecessary copying of `String`.
 #[derive(Debug, Default, Clone)]
 pub struct TitledWordCount<'a> {
     pub title: Option<&'a str>,