We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Show pandas style Table of Contents on the left side in docs
Right now our docs show a weird Table of Contents for only a section, rather than the entire doc. Can we fix it so it shows the Table of Contents of the entire docs, e.g. start from the top level?

<img width="647" alt="Screen Shot 2019-04-23 at 4 40 38 PM" src="https://user-images.githubusercontent.com/323388/56622865-9351b600-65e6-11e9-98b3-7930660b1c93.png">



--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `docs/source/conf.py`
Content:
```
1 # Configuration file for the Sphinx documentation builder.
2 #
3 # This file only contains a selection of the most common options. For a full
4 # list see the documentation:
5 # http://www.sphinx-doc.org/en/master/config
6 
7 # -- Path setup --------------------------------------------------------------
8 
9 # If extensions (or modules to document with autodoc) are in another directory,
10 # add these directories to sys.path here. If the directory is relative to the
11 # documentation root, use os.path.abspath to make it absolute, like shown here.
12 
13 import os
14 import sys
15 from databricks import koalas
16 sys.path.insert(0, os.path.abspath('.'))
17 
18 
19 # -- Project information -----------------------------------------------------
20 
21 project = 'Koalas'
22 copyright = '2019, Databricks'
23 author = 'The Koalas Team'
24 
25 # The full version, including alpha/beta/rc tags
26 release = os.environ.get('RELEASE_VERSION', koalas.__version__)
27 
28 
29 # -- General configuration ---------------------------------------------------
30 
31 # If your documentation needs a minimal Sphinx version, state it here.
32 needs_sphinx = '1.2'
33 
34 # Add any Sphinx extension module names here, as strings. They can be
35 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
36 # ones.
37 extensions = [
38     'sphinx.ext.autodoc',
39     'sphinx.ext.viewcode',
40     'numpydoc',  # handle NumPy documentation formatted docstrings. Needs to install
41     'nbsphinx',  # Jupyter Notebook. Needs to install
42 ]
43 
44 # Add any paths that contain templates here, relative to this directory.
45 templates_path = ['_templates']
46 
47 # List of patterns, relative to source directory, that match files and
48 # directories to ignore when looking for source files.
49 # This pattern also affects html_static_path and html_extra_path.
50 exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
51 
52 # The name of the Pygments (syntax highlighting) style to use.
53 pygments_style = 'sphinx'
54 
55 # The master toctree document.
56 master_doc = 'index'
57 
58 numpydoc_show_class_members = False
59 
60 # -- Options for auto output -------------------------------------------------
61 
62 autoclass_content = 'both'
63 autosummary_generate = True
64 
65 
66 # -- Options for HTML output -------------------------------------------------
67 
68 # The theme to use for HTML and HTML Help pages.  See the documentation for
69 # a list of builtin themes.
70 #
71 html_theme = 'nature'
72 
73 # Add any paths that contain custom static files (such as style sheets) here,
74 # relative to this directory. They are copied after the builtin static files,
75 # so a file named "default.css" will overwrite the builtin "default.css".
76 html_static_path = ['_static']
77 
78 # If false, no index is generated.
79 html_use_index = False
80 
81 # If false, no module index is generated.
82 html_domain_indices = False
83 
84 
85 # -- Options for manual page output ---------------------------------------
86 
87 # One entry per manual page. List of tuples
88 # (source start file, name, description, authors, manual section).
89 man_pages = [
90     ('index', 'databricks.koalas', u'databricks.koalas Documentation',
91      [u'Author'], 1)
92 ]
93
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/docs/source/conf.py b/docs/source/conf.py
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -68,13 +68,16 @@
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #
-html_theme = 'nature'
+html_theme = 'nature_with_gtoc'
 
 # Add any paths that contain custom static files (such as style sheets) here,
 # relative to this directory. They are copied after the builtin static files,
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ['_static']
 
+# Add any paths that contain custom themes here, relative to this directory.
+html_theme_path = ['themes']
+
 # If false, no index is generated.
 html_use_index = False

{"golden_diff": "diff --git a/docs/source/conf.py b/docs/source/conf.py\n--- a/docs/source/conf.py\n+++ b/docs/source/conf.py\n@@ -68,13 +68,16 @@\n # The theme to use for HTML and HTML Help pages.  See the documentation for\n # a list of builtin themes.\n #\n-html_theme = 'nature'\n+html_theme = 'nature_with_gtoc'\n \n # Add any paths that contain custom static files (such as style sheets) here,\n # relative to this directory. They are copied after the builtin static files,\n # so a file named \"default.css\" will overwrite the builtin \"default.css\".\n html_static_path = ['_static']\n \n+# Add any paths that contain custom themes here, relative to this directory.\n+html_theme_path = ['themes']\n+\n # If false, no index is generated.\n html_use_index = False\n", "issue": "Show pandas style Table of Contents on the left side in docs\nRight now our docs show a weird Table of Contents for only a section, rather than the entire doc. Can we fix it so it shows the Table of Contents of the entire docs, e.g. start from the top level?\r\n\r\n<img width=\"647\" alt=\"Screen Shot 2019-04-23 at 4 40 38 PM\" src=\"https://user-images.githubusercontent.com/323388/56622865-9351b600-65e6-11e9-98b3-7930660b1c93.png\">\r\n\r\n\n", "before_files": [{"content": "# Configuration file for the Sphinx documentation builder.\n#\n# This file only contains a selection of the most common options. For a full\n# list see the documentation:\n# http://www.sphinx-doc.org/en/master/config\n\n# -- Path setup --------------------------------------------------------------\n\n# If extensions (or modules to document with autodoc) are in another directory,\n# add these directories to sys.path here. If the directory is relative to the\n# documentation root, use os.path.abspath to make it absolute, like shown here.\n\nimport os\nimport sys\nfrom databricks import koalas\nsys.path.insert(0, os.path.abspath('.'))\n\n\n# -- Project information -----------------------------------------------------\n\nproject = 'Koalas'\ncopyright = '2019, Databricks'\nauthor = 'The Koalas Team'\n\n# The full version, including alpha/beta/rc tags\nrelease = os.environ.get('RELEASE_VERSION', koalas.__version__)\n\n\n# -- General configuration ---------------------------------------------------\n\n# If your documentation needs a minimal Sphinx version, state it here.\nneeds_sphinx = '1.2'\n\n# Add any Sphinx extension module names here, as strings. They can be\n# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom\n# ones.\nextensions = [\n    'sphinx.ext.autodoc',\n    'sphinx.ext.viewcode',\n    'numpydoc',  # handle NumPy documentation formatted docstrings. Needs to install\n    'nbsphinx',  # Jupyter Notebook. Needs to install\n]\n\n# Add any paths that contain templates here, relative to this directory.\ntemplates_path = ['_templates']\n\n# List of patterns, relative to source directory, that match files and\n# directories to ignore when looking for source files.\n# This pattern also affects html_static_path and html_extra_path.\nexclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']\n\n# The name of the Pygments (syntax highlighting) style to use.\npygments_style = 'sphinx'\n\n# The master toctree document.\nmaster_doc = 'index'\n\nnumpydoc_show_class_members = False\n\n# -- Options for auto output -------------------------------------------------\n\nautoclass_content = 'both'\nautosummary_generate = True\n\n\n# -- Options for HTML output -------------------------------------------------\n\n# The theme to use for HTML and HTML Help pages.  See the documentation for\n# a list of builtin themes.\n#\nhtml_theme = 'nature'\n\n# Add any paths that contain custom static files (such as style sheets) here,\n# relative to this directory. They are copied after the builtin static files,\n# so a file named \"default.css\" will overwrite the builtin \"default.css\".\nhtml_static_path = ['_static']\n\n# If false, no index is generated.\nhtml_use_index = False\n\n# If false, no module index is generated.\nhtml_domain_indices = False\n\n\n# -- Options for manual page output ---------------------------------------\n\n# One entry per manual page. List of tuples\n# (source start file, name, description, authors, manual section).\nman_pages = [\n    ('index', 'databricks.koalas', u'databricks.koalas Documentation',\n     [u'Author'], 1)\n]\n", "path": "docs/source/conf.py"}], "after_files": [{"content": "# Configuration file for the Sphinx documentation builder.\n#\n# This file only contains a selection of the most common options. For a full\n# list see the documentation:\n# http://www.sphinx-doc.org/en/master/config\n\n# -- Path setup --------------------------------------------------------------\n\n# If extensions (or modules to document with autodoc) are in another directory,\n# add these directories to sys.path here. If the directory is relative to the\n# documentation root, use os.path.abspath to make it absolute, like shown here.\n\nimport os\nimport sys\nfrom databricks import koalas\nsys.path.insert(0, os.path.abspath('.'))\n\n\n# -- Project information -----------------------------------------------------\n\nproject = 'Koalas'\ncopyright = '2019, Databricks'\nauthor = 'The Koalas Team'\n\n# The full version, including alpha/beta/rc tags\nrelease = os.environ.get('RELEASE_VERSION', koalas.__version__)\n\n\n# -- General configuration ---------------------------------------------------\n\n# If your documentation needs a minimal Sphinx version, state it here.\nneeds_sphinx = '1.2'\n\n# Add any Sphinx extension module names here, as strings. They can be\n# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom\n# ones.\nextensions = [\n    'sphinx.ext.autodoc',\n    'sphinx.ext.viewcode',\n    'numpydoc',  # handle NumPy documentation formatted docstrings. Needs to install\n    'nbsphinx',  # Jupyter Notebook. Needs to install\n]\n\n# Add any paths that contain templates here, relative to this directory.\ntemplates_path = ['_templates']\n\n# List of patterns, relative to source directory, that match files and\n# directories to ignore when looking for source files.\n# This pattern also affects html_static_path and html_extra_path.\nexclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']\n\n# The name of the Pygments (syntax highlighting) style to use.\npygments_style = 'sphinx'\n\n# The master toctree document.\nmaster_doc = 'index'\n\nnumpydoc_show_class_members = False\n\n# -- Options for auto output -------------------------------------------------\n\nautoclass_content = 'both'\nautosummary_generate = True\n\n\n# -- Options for HTML output -------------------------------------------------\n\n# The theme to use for HTML and HTML Help pages.  See the documentation for\n# a list of builtin themes.\n#\nhtml_theme = 'nature_with_gtoc'\n\n# Add any paths that contain custom static files (such as style sheets) here,\n# relative to this directory. They are copied after the builtin static files,\n# so a file named \"default.css\" will overwrite the builtin \"default.css\".\nhtml_static_path = ['_static']\n\n# Add any paths that contain custom themes here, relative to this directory.\nhtml_theme_path = ['themes']\n\n# If false, no index is generated.\nhtml_use_index = False\n\n# If false, no module index is generated.\nhtml_domain_indices = False\n\n\n# -- Options for manual page output ---------------------------------------\n\n# One entry per manual page. List of tuples\n# (source start file, name, description, authors, manual section).\nman_pages = [\n    ('index', 'databricks.koalas', u'databricks.koalas Documentation',\n     [u'Author'], 1)\n]\n", "path": "docs/source/conf.py"}]}