Refactor human_join into its own private helper function

discord/utils.py

@@ -1380,3 +1380,17 @@ CAMEL_CASE_REGEX = re.compile(r'(?<!^)(?=[A-Z])')
 
 def _to_kebab_case(text: str) -> str:
     return CAMEL_CASE_REGEX.sub('-', text).lower()
+
+
+def _human_join(seq: Sequence[str], /, *, delimiter: str = ', ', final: str = 'or') -> str:
+    size = len(seq)
+    if size == 0:
+        return ''
+
+    if size == 1:
+        return seq[0]
+
+    if size == 2:
+        return f'{seq[0]} {final} {seq[1]}'
+
+    return delimiter.join(seq[:-1]) + f' {final} {seq[-1]}'