Change pretend to dry-run

src/cli.rs

@@ -97,10 +97,10 @@ Note that this will not preserve the directory structure of the input files when
                 .action(ArgAction::SetTrue),
         )
         .arg(
-            Arg::new("pretend")
+            Arg::new("dry-run")
                 .help("Do not write any files, only show compression results")
-                .short('P')
-                .long("pretend")
+                .short('d')
+                .long("dry-run")
                 .action(ArgAction::SetTrue),
         )
         .arg(

src/lib.rs

@@ -263,7 +263,7 @@ pub fn optimize(input: &InFile, output: &OutFile, opts: &Options) -> PngResult<(
 
     match (output, input) {
         (OutFile::None, _) => {
-            info!("{savings}: Running in pretend mode, no output");
+            info!("{savings}: Dry run, no output");
         }
         (&OutFile::StdOut, _) | (&OutFile::Path { path: None, .. }, &InFile::StdIn) => {
             let mut buffer = BufWriter::new(stdout());

src/main.rs

@@ -233,7 +233,7 @@ fn parse_opts_into_struct(
         None
     };
 
-    let out_file = if matches.get_flag("pretend") {
+    let out_file = if matches.get_flag("dry-run") {
         OutFile::None
     } else if matches.get_flag("stdout") {
         OutFile::StdOut