Merge pull request #3119 from PoppyBagel/fix-formatting

[doc] Fix wrong formatting in parametrize.rst

Author: nicoddemus

doc/en/parametrize.rst

@@ -123,7 +123,7 @@ To get all combinations of multiple parametrized arguments you can stack
     def test_foo(x, y):
         pass
 
-This will run the test with the arguments set to ``x=0/y=2``,``x=1/y=2``, 
+This will run the test with the arguments set to ``x=0/y=2``, ``x=1/y=2``, 
 ``x=0/y=3``, and ``x=1/y=3`` exhausting parameters in the order of the decorators.
 
 .. _`pytest_generate_tests`: