Optimise and clean up remove_repeated_chars

src/funcs.rs

@@ -250,19 +250,12 @@ fn attachments_to_format(attachments: &[serenity::Attachment]) -> Option<&'stati
 }
 
 fn remove_repeated_chars(content: &str, limit: usize) -> String {
-    content
-        .chars()
-        .group_by(|&c| c)
-        .into_iter()
-        .map(|(key, group)| {
-            let group: String = group.collect();
-            if group.chars().count() > limit {
-                key.to_string().repeat(limit)
-            } else {
-                group
-            }
-        })
-        .collect()
+    let mut out = String::new();
+    for (_, group) in &content.chars().group_by(|&c| c) {
+        out.extend(group.take(limit));
+    }
+
+    out
 }
 
 pub async fn run_checks(