Update help text with descriptions of options

README.md

@@ -13,9 +13,9 @@ cargo install --git https://github.com/triarius/riceware
 Usage: riceware [OPTIONS]
 
 Options:
- -n, --num-words <NUM_WORDS> [default: 4]
- -s, --separator <SEPARATOR> [default: " "]
- -d, --dict-path <DICT_PATH>
+ -n, --num-words <NUM_WORDS> The number of words in the passphrase [default: 4]
+ -s, --separator <SEPARATOR> The string to separate words in the passphrase [default: " "]
+ -d, --dict-path <DICT_PATH> A path to a dictionary file. A builtin dictionary is used if not provided
  -h, --help Print help
  -V, --version Print version
 ```

src/main.rs

@@ -7,12 +7,15 @@ use eyre::Result;
 #[derive(Parser, Debug)]
 #[command(author, version, about, long_about = None)]
 struct Args {
+ /// The number of words in the passphrase
  #[arg(short, long, default_value = "4")]
  num_words: usize,
 
+ /// The string to separate words in the passphrase
  #[arg(short, long, default_value = " ")]
  separator: String,
 
+ /// A path to a dictionary file. A builtin dictionary is used if not provided.
  #[arg(short, long)]
  dict_path: Option<String>,
 }