Merge pull request matplotlib#19962 from story645/story645-install-troubleshooting

Dev install troubleshooting

Author: timhoffm

doc/devel/development_setup.rst

@@ -132,4 +132,4 @@ Optional, but recommended:
   Python packages and must be installed separately. The documentation can be
   built without Inkscape and optipng, but the build process will raise various
   warnings. If the build process warns that you are missing fonts, make sure
-  your LaTeX distribution bundles cm-super or install it separately.
+  your LaTeX distribution bundles cm-super or install it separately.

doc/devel/testing.rst

@@ -37,7 +37,7 @@ Running the tests
 
 In the root directory of your development repository run::
 
-   pytest
+   python -m pytest
 
 
 pytest can be configured via a lot of `command-line parameters`_. Some
@@ -258,10 +258,10 @@ Run the tests
 ^^^^^^^^^^^^^
 To run the all the tests on your installed version of Matplotlib::
 
-    pytest --pyargs matplotlib.tests
+    python -m pytest --pyargs matplotlib.tests
 
 The test discovery scope can be narrowed to single test modules or even single
 functions::
 
-    pytest --pyargs matplotlib.tests.test_simplification.py::test_clipping
+    python -m pytest --pyargs matplotlib.tests.test_simplification.py::test_clipping