Remove spaces at end of line in all python files

These are useless, git complain about them and they cause unnecessary diffs when having editor configured to automatically remove spaces at end of lines, so let's do a big commit to remove them all at once

See merge request nexedi/erp5!1672

bt5/erp5_data_notebook/TestTemplateItem/portal_components/test.erp5.testExecuteJupyter.py

@@ -757,9 +757,9 @@ context.Base_renderAsHtml(iframe)
 
     # The big hash in this string was previous calculated using the expect hash
     # of the pivot table page's html.
-    pivottable_frame_display_path = 'Base_displayPivotTableFrame?key=853524757258b19805d13beb8c6bd284a7af4a974a96a3e5a4847885df069a74d3c8c1843f2bcc4d4bb3c7089194b57c90c14fe8dd0c776d84ce0868e19ac411'
+    pivottable_frame_display_path = 'Base_displayPivotTableFrame?key=58498be478377296776617d058c67b94ef7259fd519f5274ea9837b136c380fb12d009f5f84af95b309d19803863a3ccdc75f64f912fd7095c0cff77a311c945'
 
-    self.assertTrue(pivottable_frame_display_path in json_result['code_result'])
+    self.assertIn(pivottable_frame_display_path, json_result['code_result'])
 
   def testConsecutiveImports(self):
     '''

bt5/erp5_run_my_doc/ExtensionTemplateItem/portal_components/extension.erp5.ERP5RunMyDocs.py

@@ -77,7 +77,7 @@ def extractTest(text):
           testcode += row[0].text
         else:
           testcode += lxml.html.tostring(row)
-  return testcode
+  return testcode.strip()
 
 """
   HTML5 Presentation validador

bt5/erp5_run_my_doc/TestTemplateItem/portal_components/test.erp5.testRunMyDoc.py

@@ -34,7 +34,7 @@ class TestRunMyDoc(ERP5TypeTestCase):
   """
    Basic Test for internal implementation of RunMyDocs
   """
-
+  maxDiff = None
   def getTitle(self):
     return "Run My Doc"
 

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/Resource_hashVariationCategoryItemList.py

@@ -14,7 +14,7 @@ for item in item_list:
 
   # Hash key from item_value
   item_split = item_value.split('/')
-  item_key = '/'.join(item_split[:split_depth] , '/' )
+  item_key = '/'.join(item_split[:split_depth])
 
   if item_key not in sub_field_dict:
     # Create property dict