Remove CLI default arguments

src/cli.rs

@@ -5,11 +5,10 @@ use structopt::StructOpt;
 #[derive(Debug, StructOpt)]
 #[structopt(name = "xfizzbuzz", about = "An extensible fizzbuzz implementation.")]
 pub struct Cli {
-    #[structopt(default_value = "15", help = "The maximum number to count to.")]
+    #[structopt(help = "The maximum number to count to.")]
     pub max_number: u32,
 
     #[structopt(
-        default_value = "3:fizz 5:buzz",
         help = "The words to replace the number with when it is a multiple of a number, formatted as a space-separated list of '<number>:<word>'. The order of the words specified in the arguments will be the order the words are placed if a number is qualified for more than one word."
     )]
     pub words: Vec<String>,