#7558: Added a rule for ?.

IPython/nbconvert/utils/lexers.py

@@ -50,6 +50,8 b" line_re = re.compile('.*?\\n')"
 
 ipython_tokens = [
   (r"(?s)(\s*)(%%)(\w+)(.*)", bygroups(Text, Operator, Keyword, Text)),
+  (r"(%%?)(\w+)(\?\??)$",  bygroups(Operator, Keyword, Operator)),
+  (r"\b(\?\??)(\s*)$",  bygroups(Operator, Text)),
   (r'(%)(sx|sc|system)(.*)(\n)', bygroups(Operator, Keyword,
                                        using(BashLexer), Text)),
   (r'(%)(\w+)(.*\n)', bygroups(Operator, Keyword, Text)),

IPython/nbconvert/utils/tests/test_lexers.py

@@ -92,3 +92,12 b' class TestLexers(TestsBase):'
             (Token.Text, '\n$foo\n'),
         ]
         self.assertEqual(tokens_2, list(self.lexer.get_tokens(fragment_2)))
+
+        fragment_2 = '%system?\n'
+        tokens_2 = [
+            (Token.Operator, '%'),
+            (Token.Keyword, 'system'),
+            (Token.Operator, '?'),
+            (Token.Text, '\n'),
+        ]
+        self.assertEqual(tokens_2, list(self.lexer.get_tokens(fragment_2)))