Merge pull request #17943 from meeseeksmachine/auto-backport-of-pr-17…

…942-on-v3.3.x

Backport PR #17942 on branch v3.3.x (Increase heading level for 3.3 What's New)

doc/api/api_changes.rst

@@ -14,7 +14,7 @@ For API changes in older versions see
    api_changes_old
 
 Changes for the latest version are listed below. For new features that were
-added to Matplotlib, see :ref:`whats-new`.
+added to Matplotlib, see :ref:`whats-new`
 
 .. ifconfig:: releaselevel == 'dev'
 

doc/conf.py

@@ -114,13 +114,13 @@ def _check_dependencies():
 
 intersphinx_mapping = {
     'Pillow': ('https://pillow.readthedocs.io/en/stable/', None),
-    'cycler': ('https://matplotlib.org/cycler', None),
+    'cycler': ('https://matplotlib.org/cycler/', None),
     'dateutil': ('https://dateutil.readthedocs.io/en/stable/', None),
     'ipykernel': ('https://ipykernel.readthedocs.io/en/latest/', None),
     'numpy': ('https://numpy.org/doc/stable/', None),
     'pandas': ('https://pandas.pydata.org/pandas-docs/stable/', None),
-    'pytest': ('https://pytest.org/en/stable', None),
-    'python': ('https://docs.python.org/3', None),
+    'pytest': ('https://pytest.org/en/stable/', None),
+    'python': ('https://docs.python.org/3/', None),
     'scipy': ('https://docs.scipy.org/doc/scipy/reference/', None),
 }
 
@@ -133,8 +133,8 @@ def _check_dependencies():
     'doc_module': ('matplotlib', 'mpl_toolkits'),
     'reference_url': {
         'matplotlib': None,
-        'numpy': 'https://docs.scipy.org/doc/numpy',
-        'scipy': 'https://docs.scipy.org/doc/scipy/reference',
+        'numpy': 'https://docs.scipy.org/doc/numpy/',
+        'scipy': 'https://docs.scipy.org/doc/scipy/reference/',
     },
     'backreferences_dir': 'api/_as_gen',
     'subsection_order': gallery_order.sectionorder,

doc/users/next_whats_new/README.rst

@@ -1,7 +1,7 @@
 :orphan:
 
-What's new in unreleased Matplotlib?
-====================================
+Instructions for writing "What's new" entries
+=============================================
 
 Please place new portions of `whats_new.rst` in the `next_whats_new` directory.