chore (backend-rs): use pretty_assertions in unit tests

packages/backend-rs/src/misc/acct.rs

@@ -36,6 +36,7 @@ pub fn acct_to_string(acct: &Acct) -> String {
 #[cfg(test)]
 mod unit_test {
     use super::{acct_to_string, string_to_acct, Acct};
+    use pretty_assertions::assert_eq;
 
     #[test]
     fn test_acct_to_string() {

packages/backend-rs/src/misc/nyaify.rs

@@ -82,6 +82,7 @@ pub fn nyaify(text: &str, lang: Option<&str>) -> String {
 #[cfg(test)]
 mod unit_test {
     use super::nyaify;
+    use pretty_assertions::assert_eq;
 
     #[test]
     fn can_nyaify() {