clean up doc dir (#565)

* clean up doc dir

* clean up doc dir

* clean up doc dir

.circleci/config.yml

@@ -12,7 +12,7 @@ jobs:
       - python/load-cache
       - python/install-deps
       - python/save-cache
-      - run: pip install sphinx sphinx-autobuild sphinx-rtd-theme pytest
+      - run: pip install sphinx sphinx-autobuild sphinx-rtd-theme pytest IPython
       - run:
           command: cd docs;make html
           name: doc_build

docs/conf.py

@@ -20,7 +20,7 @@ import os
 # -- Project information -----------------------------------------------------
 
 project = 'PythonRobotics'
-copyright = '2018, Atsushi Sakai'
+copyright = '2018-2021, Atsushi Sakai'
 author = 'Atsushi Sakai'
 
 # The short X.Y version
@@ -43,6 +43,7 @@ extensions = [
     'sphinx.ext.mathjax',
     'sphinx.ext.viewcode',
     'sphinx.ext.viewcode',
+    'IPython.sphinxext.ipython_console_highlighting',
 ]
 
 # Add any paths that contain templates here, relative to this directory.

docs/modules/path_planning/path_planning.rst

@@ -39,7 +39,7 @@ In the animation, cyan points are searched nodes.
 
 Its heuristic is 2D Euclid distance.
 
-.. _a*-algorithm:
+.. _D*-algorithm:
 
 D\* algorithm
 ~~~~~~~~~~~~~