mypy and formatting

rich/text.py

@@ -1060,7 +1060,7 @@ class Text(JupyterMixin):
         blank_lines = 0
         for line in text.split():
             match = re_indent.match(line.plain)
-            if not match.group(2):
+            if not match or not match.group(2):
                 blank_lines += 1
                 continue
             indent = match.group(1)
@@ -1096,4 +1096,4 @@ def __add__(self, other: Any) -> "Text":
 """
     text = Text(code)
     text = text.with_indent_guides()
-    print(text)
+    print(text)

tests/test_text.py

@@ -635,4 +635,4 @@ foo = [
     print(result.plain)
     print(repr(result.plain))
     expected = "for a in range(10):\n│   print(a)\n\nfoo = [\n│   1,\n│   {\n│   │   2\n│   }\n]\n"
-    assert result.plain == expected
+    assert result.plain == expected