Doc comment

src/args.rs

@@ -12,6 +12,10 @@ pub(crate) struct Args {
     ///revealed. Valid arguments are "white", "yellow", "magenta", "blue",
     ///"green", "red", and "cyan".
     pub(crate) foreground: Option<OsString>,
+
+    /// Set the autoDecrypt flag according to the true/false value of the
+    /// 'setting' argument. When set to true, nmseffect_exec() will not
+    /// require a key press to start the decryption effect.
     pub(crate) autodecrypt: bool,
 
     /// Set the maskBlank flag according to the true/false value of the