docs(args): Clarify command line arguments

src/args.rs

@@ -43,7 +43,7 @@ impl Default for Format {
     )]
 pub(crate) struct Args {
     #[structopt(parse(from_os_str), default_value = ".")]
-    /// Paths to check
+    /// Paths to check with `-` for stdin
     pub(crate) path: Vec<std::path::PathBuf>,
 
     #[structopt(short = "c", long = "config")]
@@ -59,19 +59,19 @@ pub(crate) struct Args {
     pub(crate) diff: bool,
 
     #[structopt(long, short = "w")]
-    /// Write corrections out
+    /// Write fixes out
     pub(crate) write_changes: bool,
 
     #[structopt(long)]
-    /// Print each file that would be spellchecked.
+    /// Debug: Print each file that would be spellchecked.
     pub(crate) files: bool,
 
     #[structopt(long)]
-    /// Print each identifier that would be spellchecked.
+    /// Debug: Print each identifier that would be spellchecked.
     pub(crate) identifiers: bool,
 
     #[structopt(long)]
-    /// Print each word that would be spellchecked.
+    /// Debug: Print each word that would be spellchecked.
     pub(crate) words: bool,
 
     #[structopt(flatten)]