take into account slightly different error with Python 2.6 in test_easystack_wrong_structure

Author: boegel

test/framework/options.py

@@ -5642,8 +5642,9 @@ def test_easystack_wrong_structure(self):
         toy_easystack = os.path.join(topdir, 'easystacks', 'test_easystack_wrong_structure.yaml')
 
         expected_err = r"[\S\s]*An error occurred when interpreting the data for software Bioconductor:"
-        expected_err += r" 'float' object is not subscriptable[\S\s]*"
-        expected_err += r"| 'float' object has no attribute '__getitem__'[\S\s]*"
+        expected_err += r"( 'float' object is not subscriptable[\S\s]*"
+        expected_err += r"| 'float' object is unsubscriptable"
+        expected_err += r"| 'float' object has no attribute '__getitem__'[\S\s]*)"
         self.assertErrorRegex(EasyBuildError, expected_err, parse_easystack, toy_easystack)
 
     def test_easystack_asterisk(self):