Fix flake8

Author: hoxbro

lib/matplotlib/dates.py

@@ -596,7 +596,9 @@ def _wrap_in_tex(text):
     ret_text = re.sub(p, r'}$\1$\\mathdefault{', text)
 
     # Braces ensure symbols are not spaced like binary operators.
-    ret_text = ret_text.replace('-', '{-}').replace(':', '{:}').replace(' ', r'\;')
+    ret_text = ret_text.replace('-', '{-}').replace(':', '{:}')
+    # To not concatenate space between numbers.
+    ret_text = ret_text.replace(' ', r'\;')
     ret_text = '$\\mathdefault{' + ret_text + '}$'
     ret_text = ret_text.replace('$\\mathdefault{}$', '')
     return ret_text

lib/matplotlib/tests/test_dates.py

@@ -323,11 +323,11 @@ def callable_formatting_function(dates, _):
 
 @pytest.mark.parametrize('delta, expected', [
     (datetime.timedelta(weeks=52 * 200),
-     [r'$\mathdefault{%d}$' % (year,) for year in range(1990, 2171, 20)]),
+     [r'$\mathdefault{%d}$' % year for year in range(1990, 2171, 20)]),
     (datetime.timedelta(days=30),
-     [r'Jan$\mathdefault{\;%02d\;1990}$' % (day,) for day in range(1, 32, 3)]),
+     [r'Jan$\mathdefault{\;%02d\;1990}$' % day for day in range(1, 32, 3)]),
     (datetime.timedelta(hours=20),
-     [r'$\mathdefault{%02d{:}00{:}00}$' % (hour,) for hour in range(0, 21, 2)]),
+     [r'$\mathdefault{%02d{:}00{:}00}$' % hour for hour in range(0, 21, 2)]),
 ])
 def test_date_formatter_usetex(delta, expected):
     d1 = datetime.datetime(1990, 1, 1)