Slightly simpler indentation (#209)

pytest_accept/doctest_plugin.py

@@ -195,15 +195,10 @@ def pytest_sessionfinish(session, exitstatus):
                 print(line, file=file)
 
             for current, next in zip_longest(failures, failures[1:]):
-                # Note that `current.example.indent` no longer works in python 3.13,
-                # since docstrings are now dedented. So we calculate it from the source.
-                existing_indent = len(
-                    re.match(r" *", original[next_start_line]).group()
-                )
+                # Get the existing indentation from the source line
+                existing_indent = re.match(r"\s*", original[next_start_line]).group()
                 snapshot_result = _to_doctest_format(current.got)
-                indented = textwrap.indent(
-                    snapshot_result, prefix=" " * existing_indent
-                )
+                indented = textwrap.indent(snapshot_result, prefix=existing_indent)
                 for line in indented.splitlines():
                     print(line, file=file)