refactor: clean up arguments

src/commands/cmd_completions.rs

@@ -3,7 +3,7 @@ use clap_complete::{generate, Generator, Shell};
 use std::io;
 
 /// Generate shell completions
-#[derive(clap::Parser, Debug)]
+#[derive(Parser, Debug)]
 pub struct Cli {
     shell: Shell,
 }

src/commands/cmd_list.rs

@@ -113,7 +113,7 @@ pub struct Cli {
     mode:       Mode,
 
     /// Check (fsck) the filesystem first
-    #[arg(short, long, default_value_t=false)]
+    #[arg(short, long)]
     fsck:       bool,
 
     /// Force color on/off. Default: autodetect tty

src/commands/cmd_subvolume.rs

@@ -25,7 +25,7 @@ enum Subcommands {
     #[command(allow_missing_positional = true)]
     Snapshot {
         /// Make snapshot read only
-        #[arg(long, short = 'r')]
+        #[arg(long, short)]
         read_only: bool,
         source: Option<PathBuf>,
         dest: PathBuf