Clippy + fmt.

src/main.rs

@@ -2,6 +2,7 @@ extern crate getopts;
 extern crate rand;
 extern crate ansi_term;
 
+
 use std::io;
 use std::io::prelude::*;
 use std::f32::consts::PI;
@@ -11,6 +12,7 @@ use getopts::Options;
 use rand::{thread_rng, Rng};
 use ansi_term::Colour::RGB;
 
+
 fn print_usage(program: &str, opts: Options) {
     let brief = format!("Usage: {} [OPTION]... [FILE]...", program);
 
@@ -28,10 +30,10 @@ fn main() {
     opts.optopt("S", "seed", "Rainbow seed, 0 = random", "<i>");
     opts.optflag("h", "help", "Show this message");
 
-    // @todo do not panic!
+    // TODO Do not panic!
     let matches = match opts.parse(&args[1..]) {
-        Ok(m) => { m }
-        Err(f) => { panic!(f.to_string()) }
+        Ok(m) => m,
+        Err(f) => panic!(f.to_string()),
     };
 
     // print usage?
@@ -42,47 +44,44 @@ fn main() {
     }
 
     // get spread.
-    // @todo this is nasty... fix this.
+    // TODO this is nasty... fix this.
     let spread: f32 = match matches.opt_default("spread", "3.0") {
         Some(s) => {
             match s.parse() {
-                Ok(0.0) => 3.0,
-                Ok(n) => n,
-                _ => 3.0
+                Ok(n) if n != 0.0 => n,
+                _ => 3.0,
             }
-        },
-        None => 3.0
+        }
+        None => 3.0,
     };
 
     // get freq.
-    // @todo this is nasty... fix this.
+    // TODO this is nasty... fix this.
     let freq: f32 = match matches.opt_default("freq", "0.1") {
         Some(s) => {
             match s.parse() {
-                Ok(0.0) => 0.1,
-                Ok(n) => n,
-                _ => 0.1
+                Ok(n) if n != 0.0 => n,
+                _ => 0.1,
             }
-        },
-        None => 0.1
+        }
+        None => 0.1,
     };
 
     // get seed.
-    // @todo this is nasty... fix this.
+    // TODO this is nasty... fix this.
     let mut seed: i32 = match matches.opt_default("seed", "0") {
         Some(s) => {
             match s.parse() {
-                Ok(0) => thread_rng().gen_range(0, 256),
-                Ok(n) => n,
-                _ => thread_rng().gen_range(0, 256)
+                Ok(n) if n != 0 => n,
+                _ => thread_rng().gen_range(0, 256),
             }
-        },
-        None => thread_rng().gen_range(0, 256)
+        }
+        None => thread_rng().gen_range(0, 256),
     };
 
     let stdin = io::stdin();
 
-    // @todo I want to use chars() instead, but it's unstable right now :(
+    // TODO I want to use chars() instead, but it's unstable right now :(
     for line in stdin.lock().lines() {
         seed += 1;
 
@@ -96,7 +95,7 @@ fn main() {
             print!("{}", RGB(red, green, blue).paint(c.to_string()));
         }
 
-        print!("\n");
+        println!();
     }
 }