Fix all feasible clippy issues (#687)

And the ones not deemed feasible were officialy allowed so folks running
`cargo clippy` should see no warnings.

src/cli_utils.rs

@@ -242,7 +242,7 @@ impl<W: Write> Printer<W> {
         Ok(())
     }
 
-    fn print_code_stats<'a, 'b>(
+    fn print_code_stats(
         &mut self,
         language_type: LanguageType,
         stats: &[CodeStats],
@@ -283,7 +283,7 @@ impl<W: Write> Printer<W> {
                     .collect::<Vec<_>>(),
             )?;
         }
-        let mut subtotal = tokei::Report::new(format!("(Total)").into());
+        let mut subtotal = tokei::Report::new("(Total)".into());
         let summary = parent.summarise();
         subtotal.stats.code += summary.code;
         subtotal.stats.comments += summary.comments;
@@ -394,7 +394,7 @@ impl<W: Write> Printer<W> {
             return Ok(());
         }
 
-        let mut subtotal = tokei::Report::new(format!("|- (Total)").into());
+        let mut subtotal = tokei::Report::new("|- (Total)".into());
         subtotal.stats.code += report.stats.code;
         subtotal.stats.comments += report.stats.comments;
         subtotal.stats.blanks += report.stats.blanks;

src/config.rs

@@ -97,6 +97,7 @@ impl Config {
             .and_then(Self::get_config)
             .unwrap_or_else(Self::default);
 
+        #[allow(clippy::or_fun_call)]
         Config {
             columns: current_dir
                 .columns

src/language/language_type.rs

@@ -72,7 +72,7 @@ impl LanguageType {
                 // Get the position of the last line before the important
                 // syntax.
                 text[..=m.start()]
-                    .into_iter()
+                    .iter()
                     .rev()
                     .position(|&c| c == b'\n')
                     .filter(|&p| p != 0)

src/language/syntax.rs

@@ -316,6 +316,7 @@ impl SyntaxCounter {
         };
 
         // `Some(true)` in order to respect the current configuration.
+        #[allow(clippy::if_same_then_else)]
         if self.quote.is_some() {
             if self.quote_is_doc_quote && config.treat_doc_strings_as_comments == Some(true) {
                 self.quote.map_or(false, |q| line.starts_with(q.as_bytes()))
@@ -335,10 +336,8 @@ impl SyntaxCounter {
             true
         } else if started_in_comments {
             true
-        } else if (starts_with_comment)() {
-            true
         } else {
-            false
+            (starts_with_comment)()
         }
     }
 
@@ -437,6 +436,7 @@ impl SyntaxCounter {
                     doc_block,
                 ))
             }
+            #[allow(clippy::trivial_regex)]
             LanguageType::Html
             | LanguageType::RubyHtml
             | LanguageType::Svelte

src/utils/fs.rs

@@ -103,7 +103,7 @@ pub fn get_all_files<A: AsRef<Path>>(
         }
     };
 
-    if let Some(types) = config.types.as_ref().map(|v| &**v) {
+    if let Some(types) = config.types.as_deref() {
         rx_iter.filter(|(_, l)| types.contains(l)).for_each(process)
     } else {
         rx_iter.for_each(process)