Fix long option format on docs.podman.io

Escape the two dashes, otherwise they are combined into one long dash.
I tested that this change is safe and still renders correctly on github
and with the man pages.

This commit also contains a small change to make it build locally.
Assuming you have the dependencies installed you can do:
```
cd docs
make html
```
Preview the html files in docs/build/html with
`python -m http.server 8000 --directory build/html`.

Fixes containers/podman.io#373

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>

1 files changed, 1 insertions, 5 deletions

diff --git a/docs/source/conf.py b/docs/source/conf.py
index e3715937d..883e1240e 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -29,13 +29,9 @@ author = "team"
 # ones.
 extensions = [
     "sphinx_markdown_tables",
+    "recommonmark"
 ]
 
-source_parsers = {
-    ".md": "recommonmark.parser.CommonMarkParser",
-}
-
-
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ["_templates"]