Remove the behavior of removing the double line breaks in python files

pytest_examples/eval_example.py

@@ -217,7 +217,7 @@ def format_black(self, example: CodeExample) -> None:
         """
         self._check_update(example)
 
-        new_content = black_format(example.source, self.config, remove_double_blank=example.in_py_file())
+        new_content = black_format(example.source, self.config)
         if new_content != example.source:
             example.source = new_content
             self._mark_for_update(example)

pytest_examples/lint.py

@@ -65,19 +65,17 @@ def replace_offset(m: re.Match):
         return stdout
 
 
-def black_format(source: str, config: ExamplesConfig, *, remove_double_blank: bool = False) -> str:
+def black_format(source: str, config: ExamplesConfig) -> str:
     # hack to avoid black complaining about our print output format
     before_black = re.sub(r'^( *#)> ', r'\1 > ', source, flags=re.M)
     after_black = black_format_str(before_black, mode=config.black_mode())
     # then revert it back
     after_black = re.sub(r'^( *#) > ', r'\1> ', after_black, flags=re.M)
-    if remove_double_blank:
-        after_black = re.sub(r'\n{3}', '\n\n', after_black)
     return after_black
 
 
 def black_check(example: CodeExample, config: ExamplesConfig) -> None:
-    after_black = black_format(example.source, config, remove_double_blank=example.in_py_file())
+    after_black = black_format(example.source, config)
     if example.source != after_black:
         diff = code_diff(example, after_black)
         raise FormatError(f'black failed:\n{indent(diff, "  ")}')

tests/cases_update/python_class.py

@@ -16,9 +16,11 @@ def foobar():
     ```py
     x = 4
 
+
     class A:
         pass
 
+
     print(x)
     #> 4
     ```