use pretty assertions to help with Windows debug

Cargo.toml

@@ -16,3 +16,6 @@ path = "src/main.rs"
 
 [dependencies]
 diff = "0.1.10"
+
+[dev-dependencies]
+pretty_assertions = "1"

src/context_diff.rs

@@ -355,7 +355,7 @@ pub fn diff(
 #[cfg(test)]
 mod tests {
     use super::*;
-
+    use pretty_assertions::assert_eq;
     #[test]
     fn test_permutations() {
         // test all possible six-line files.

src/ed_diff.rs

@@ -148,8 +148,8 @@ pub fn diff(expected: &[u8], actual: &[u8]) -> Result<Vec<u8>, DiffError> {
 
 #[cfg(test)]
 mod tests {
-
     use super::*;
+    use pretty_assertions::assert_eq;
     pub fn diff_w(expected: &[u8], actual: &[u8], filename: &str) -> Result<Vec<u8>, DiffError> {
         let mut output = diff(expected, actual)?;
         writeln!(&mut output, "w {filename}").unwrap();

src/normal_diff.rs

@@ -172,7 +172,7 @@ pub fn diff(expected: &[u8], actual: &[u8]) -> Vec<u8> {
 #[cfg(test)]
 mod tests {
     use super::*;
-
+    use pretty_assertions::assert_eq;
     #[test]
     fn test_permutations() {
         let target = "target/normal-diff/";

src/unified_diff.rs

@@ -384,6 +384,7 @@ pub fn diff(
 #[cfg(test)]
 mod tests {
     use super::*;
+    use pretty_assertions::assert_eq;
 
     #[test]
     fn test_permutations() {