[doc] fix some linkcheck errors and warnings

docs/source/changelog.rst

@@ -312,7 +312,7 @@ Thanks to the following contributors:
 - Mac Knight (`Shels1909 <https://github.com/Shels1909>`__)
 - Hisham Elsheshtawy (`Sheshtawy <https://github.com/Sheshtawy>`__)
 - Simon Biggs (`SimonBiggs <https://github.com/SimonBiggs>`__)
-- Sunil Hari (`sunilhari <https://github.com/sunilhari>`__)
+- Sunil Hari (``@sunilhari``)
 - Thomas Kluyver (`takluyver <https://github.com/takluyver>`__)
 - Tim Klever (`tklever <https://github.com/tklever>`__)
 - Gabriel Ruiz (`unnamedplay-r <https://github.com/unnamedplay-r>`__)

docs/source/examples/Notebook/Distributing Jupyter Extensions as Python Packages.ipynb

@@ -138,10 +138,7 @@
     "\n",
     "> How you distribute them, too, is important:\n",
     "- [Packaging and Distributing Projects](https://python-packaging-user-guide.readthedocs.io/tutorials/distributing-packages/)\n",
-    "- [conda: Building packages](https://conda.io/docs/building/build.html)\n",
-    "\n",
-    "> Here are some tools to get you started:\n",
-    "- [generator-nbextension](https://github.com/Anaconda-Platform/generator-nbextension)"
+    "- [conda: Building packages](https://conda.io/projects/conda-build/en/latest/user-guide/tutorials/building-conda-packages.html)\n"
    ]
   },
   {
@@ -505,7 +502,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.5"
+   "version": "3.7.2"
   }
  },
  "nbformat": 4,

docs/source/examples/Notebook/What is the Jupyter Notebook.ipynb

@@ -31,7 +31,7 @@
     "- Images\n",
     "- Video\n",
     "\n",
-    "These documents provide a **complete and self-contained record of a computation** that can be converted to various formats and shared with others using email, [Dropbox](https://www.dropbox.com/), version control systems (like git/[GitHub](https://github.com)) or [nbviewer.jupyter.org](http://nbviewer.jupyter.org)."
+    "These documents provide a **complete and self-contained record of a computation** that can be converted to various formats and shared with others using email, [Dropbox](https://www.dropbox.com/), version control systems (like git/[GitHub](https://github.com)) or [nbviewer.jupyter.org](https://nbviewer.jupyter.org)."
    ]
   },
   {
@@ -148,11 +148,11 @@
     "* **Markdown cells:** Narrative text with embedded LaTeX equations\n",
     "* **Raw cells:** Unformatted text that is included, without modification, when notebooks are converted to different formats using nbconvert\n",
     "\n",
-    "Internally, notebook documents are **[JSON](https://en.wikipedia.org/wiki/JSON) data** with **binary values [base64](http://en.wikipedia.org/wiki/Base64)** encoded. This allows them to be **read and manipulated programmatically** by any programming language. Because JSON is a text format, notebook documents are version control friendly.\n",
+    "Internally, notebook documents are **[JSON](https://en.wikipedia.org/wiki/JSON) data** with **binary values [base64](https://en.wikipedia.org/wiki/Base64)** encoded. This allows them to be **read and manipulated programmatically** by any programming language. Because JSON is a text format, notebook documents are version control friendly.\n",
     "\n",
-    "**Notebooks can be exported** to different static formats including HTML, reStructeredText, LaTeX, PDF, and slide shows ([reveal.js](http://lab.hakim.se/reveal-js/)) using Jupyter's `nbconvert` utility.\n",
+    "**Notebooks can be exported** to different static formats including HTML, reStructeredText, LaTeX, PDF, and slide shows ([reveal.js](https://revealjs.com)) using Jupyter's `nbconvert` utility.\n",
     "\n",
-    "Furthermore, any notebook document available from a **public URL or on GitHub can be shared** via [nbviewer](http://nbviewer.jupyter.org). This service loads the notebook document from the URL and renders it as a static web page. The resulting web page may thus be shared with others **without their needing to install the Jupyter Notebook**."
+    "Furthermore, any notebook document available from a **public URL or on GitHub can be shared** via [nbviewer](https://nbviewer.jupyter.org). This service loads the notebook document from the URL and renders it as a static web page. The resulting web page may thus be shared with others **without their needing to install the Jupyter Notebook**."
    ]
   }
  ],
@@ -172,7 +172,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.6"
+   "version": "3.7.2"
   }
  },
  "nbformat": 4,

docs/source/examples/Notebook/Working With Markdown Cells.ipynb

@@ -93,27 +93,27 @@
    ]
   },
   {
-    "cell_type": "markdown",
-    "metadata": { },
-    "source": [
-      "And shorthand for links:\n",
-      "\n",
-      "[Jupyter's website](http://jupyter.org)"
-    ]
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "And shorthand for links:\n",
+    "\n",
+    "[Jupyter's website](https://jupyter.org)"
+   ]
   },
   {
-    "cell_type": "markdown",
-    "metadata": { },
-    "source": [
-      "You can use backslash \\ to generate literal characters which would otherwise have special meaning in the Markdown syntax.\n",
-      "\n",
-      "```\n",
-      "\\*literal asterisks\\*\n",
-      " *literal asterisks*\n",
-      "```\n",
-      "\n",
-      "Use double backslash \\ \\ to generate the literal $ symbol."
-    ]
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "You can use backslash \\ to generate literal characters which would otherwise have special meaning in the Markdown syntax.\n",
+    "\n",
+    "```\n",
+    "\\*literal asterisks\\*\n",
+    " *literal asterisks*\n",
+    "```\n",
+    "\n",
+    "Use double backslash \\ \\ to generate the literal $ symbol."
+   ]
   },
   {
    "cell_type": "markdown",
@@ -332,7 +332,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.0"
+   "version": "3.7.2"
   }
  },
  "nbformat": 4,

docs/source/examples/Notebook/examples_index.rst

@@ -5,7 +5,7 @@ Notebook Examples
 The pages in this section are all converted notebook files. You can also
 `view these notebooks on nbviewer`__.
 
-__ http://nbviewer.jupyter.org/github/jupyter/notebook/blob/master/
+__ https://nbviewer.jupyter.org/github/jupyter/notebook/blob/master/
    docs/source/examples/Notebook/
 
 .. toctree::

docs/source/extending/handlers.rst

@@ -124,4 +124,4 @@ following:
 
 References:
 
-1. `Peter Parente's Mindtrove <http://mindtrove.info/4-ways-to-extend-jupyter-notebook/#nb-server-exts>`__
+1. `Peter Parente's Mindtrove <https://mindtrove.info/4-ways-to-extend-jupyter-notebook/#nb-server-exts>`__

docs/source/troubleshooting.rst

@@ -12,7 +12,7 @@ it's easy to upgrade and get on with what you wanted to do.
 Jupyter fails to start
 ----------------------
 
-* Have you `installed it <http://jupyter.org/install.html>`__? ;-)
+* Have you `installed it <https://jupyter.org/install.html>`__? ;-)
 * If you're using a menu shortcut or Anaconda launcher to start it, try
   opening a terminal or command prompt and running the command ``jupyter notebook``.
 * If it can't find ``jupyter``,