Add some missing words in the docs

tests/readthedocs/quick_references/test_client_reference.py

@@ -0,0 +1,14 @@
+import re
+
+from telethon import TelegramClient
+
+
+def test_all_methods_present(docs_dir):
+    with (docs_dir / 'quick-references/client-reference.rst').open(encoding='utf-8') as fd:
+        present_methods = set(map(str.lstrip, re.findall(r'^ {4}\w+$', fd.read(), re.MULTILINE)))
+
+    assert len(present_methods) > 0
+    for name in dir(TelegramClient):
+        attr = getattr(TelegramClient, name)
+        if callable(attr) and not name.startswith('_'):
+            assert name in present_methods