Use similar-asserts to show bindgen diff

Cargo.toml

@@ -63,6 +63,7 @@ android-tzdata = { version = "0.1.1", optional = true }
 [dev-dependencies]
 serde_json = { version = "1" }
 serde_derive = { version = "1", default-features = false }
+similar-asserts = { version = "1.6.1" }
 bincode = { version = "1.3.0" }
 
 [target.'cfg(all(target_arch = "wasm32", not(any(target_os = "emscripten", target_os = "wasi"))))'.dev-dependencies]

tests/win_bindings.rs

@@ -14,7 +14,14 @@ fn gen_bindings() {
     // Check the output is the same as before.
     // Depending on the git configuration the file may have been checked out with `\r\n` newlines or
     // with `\n`. Compare line-by-line to ignore this difference.
-    let new = fs::read_to_string(output).unwrap();
+    let mut new = fs::read_to_string(output).unwrap();
+    if existing.contains("\r\n") && !new.contains("\r\n") {
+        new = new.replace("\n", "\r\n");
+    } else if !existing.contains("\r\n") && new.contains("\r\n") {
+        new = new.replace("\r\n", "\n");
+    }
+
+    similar_asserts::assert_eq!(existing, new);
     if !new.lines().eq(existing.lines()) {
         panic!("generated file `{}` is changed.", output);
     }