fix travis

Author: chrisjsewell

pytest_notebook/post_processors.py

@@ -43,7 +43,7 @@ def document_processors():
     """Create formatted string of all preprocessor docstrings."""
     return "\n\n".join(
         [
-            "{}:\n{}".format(n, textwrap.indent(load_processor(n).__doc__, "  "))
+            f"{n}:\n{textwrap.indent(load_processor(n).__doc__, '  ').rstrip()}"
             for n in sorted(list_processor_names())
         ]
     )

tests/test_postprocessors/test_plugins.py

@@ -3,4 +3,4 @@
 
 def test_documentation(file_regression):
     """Test all the plugins are loading, by generating combined documentation."""
-    file_regression.check(document_processors())
+    file_regression.check(document_processors() + "\n")

tests/test_postprocessors/test_plugins/test_documentation.txt

@@ -3,7 +3,6 @@ beautifulsoup:
 
       See: https://beautiful-soup-4.readthedocs.io.
 
-
 blacken_code:
   Format python source code with black (see https://black.readthedocs.io).