Closes #7558: Added a rule for cell magics.

IPython/nbconvert/utils/lexers.py

@@ -49,6 +49,7 b' from IPython.testing.skipdoctest import skip_doctest'
 line_re = re.compile('.*?\n')
 
 ipython_tokens = [
+  (r"(?s)(\s*)(%%)(\w+)(.*)", bygroups(Text, Operator, Keyword, 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

@@ -77,3 +77,12 b' class TestLexers(TestsBase):'
             (Token.Text, ' function () {}\n'),
         ]
         self.assertEqual(tokens_2, list(self.lexer.get_tokens(fragment_2)))
+
+        fragment_2 = '\t%%xyz\n$foo\n'
+        tokens_2 = [
+            (Token.Text, '\t'),
+            (Token.Operator, '%%'),
+            (Token.Keyword, 'xyz'),
+            (Token.Text, '\n$foo\n'),
+        ]
+        self.assertEqual(tokens_2, list(self.lexer.get_tokens(fragment_2)))