readme, some fixes

src/utils.rs

@@ -1,4 +1,3 @@
-use std::borrow::Cow;
 use std::error::Error;
 
 use elefren::status_builder::Visibility;
@@ -24,14 +23,14 @@ pub(crate) fn acct_to_server(acct: &str) -> Option<&str> {
     acct.trim_start_matches('@').split('@').nth(1)
 }
 
-pub(crate) fn normalize_acct<'a, 'g>(acct: &'a str, group: &'g str) -> Result<Cow<'a, str>, GroupError> {
-    let acct = acct.trim_start_matches('@');
-    if acct_to_server(acct).is_some() {
+pub(crate) fn normalize_acct(acct: &str, group: &str) -> Result<String, GroupError> {
+    let acct = acct.trim_start_matches('@').to_lowercase();
+    if acct_to_server(&acct).is_some() {
         // already has server
-        Ok(Cow::Borrowed(acct))
+        Ok(acct)
     } else if let Some(gs) = acct_to_server(group) {
         // attach server from the group actor
-        Ok(Cow::Owned(format!("{}@{}", acct, gs)))
+        Ok(format!("{}@{}", acct, gs))
     } else {
         Err(GroupError::BadConfig(
             format!("Group acct {} is missing server!", group).into(),
@@ -81,6 +80,14 @@ mod test {
             Ok("piggo@piggo.space".into()),
             normalize_acct("piggo@piggo.space", "uhh")
         );
+        assert_eq!(
+            Ok("piggo@piggo.space".into()),
+            normalize_acct("piGGgo@pIggo.spaCe", "uhh")
+        );
+        assert_eq!(
+            Ok("piggo@banana.nana".into()),
+            normalize_acct("piGGgo", "foo@baNANA.nana")
+        );
         assert_eq!(Err(GroupError::BadConfig("_".into())), normalize_acct("piggo", "uhh"));
     }
 }