fix(snap): Finish swapping colors

crates/snapbox/Cargo.toml

@@ -97,3 +97,7 @@ windows-sys = { version = "0.52.0", features = ["Win32_Foundation"], optional =
 
 [target.'cfg(unix)'.dependencies]
 libc = { version = "0.2.137", optional = true }
+
+[[example]]
+name = "diff"
+required-features = ["diff"]

crates/snapbox/examples/diff.rs

@@ -0,0 +1,24 @@
+fn main() {
+    let mut args = std::env::args();
+    let _ = args.next().expect("expects `$ diff <old> <new>`");
+    let old_path = args.next().expect("expects `$ diff <old> <new>`");
+    let new_path = args.next().expect("expects `$ diff <old> <new>`");
+    if args.next().is_some() {
+        panic!("expects `$ diff <old> <new>`");
+    }
+
+    let old = snapbox::Data::text(std::fs::read_to_string(&old_path).unwrap());
+    let new = snapbox::Data::text(std::fs::read_to_string(&new_path).unwrap());
+
+    let mut output = String::new();
+    snapbox::report::write_diff(
+        &mut output,
+        &old,
+        &new,
+        Some(&old_path),
+        Some(&new_path),
+        snapbox::report::Palette::color(),
+    )
+    .unwrap();
+    println!("{output}");
+}

crates/snapbox/src/report/color.rs

@@ -16,8 +16,8 @@ impl Palette {
                 warn: anstyle::AnsiColor::Yellow.on_default(),
                 error: anstyle::AnsiColor::Red.on_default(),
                 hint: anstyle::Effects::DIMMED.into(),
-                expected: anstyle::AnsiColor::Green.on_default() | anstyle::Effects::UNDERLINE,
-                actual: anstyle::AnsiColor::Red.on_default() | anstyle::Effects::UNDERLINE,
+                expected: anstyle::AnsiColor::Red.on_default() | anstyle::Effects::UNDERLINE,
+                actual: anstyle::AnsiColor::Green.on_default() | anstyle::Effects::UNDERLINE,
             }
         } else {
             Self::plain()