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, 9 insertions, 9 deletions

diff --git a/docs/source/markdown/podman-container-runlabel.1.md b/docs/source/markdown/podman-container-runlabel.1.md
index 36bcbab3d..84d283cf8 100644
--- a/docs/source/markdown/podman-container-runlabel.1.md
+++ b/docs/source/markdown/podman-container-runlabel.1.md
@@ -41,7 +41,7 @@ is used.
 Any additional arguments will be appended to the command.
 
 ## OPTIONS
-#### **--authfile**=*path*
+#### **\-\-authfile**=*path*
 
 Path of the authentication file. Default is ${XDG\_RUNTIME\_DIR}/containers/auth.json, which is set using `podman login`.
 If the authorization state is not found there, $HOME/.docker/config.json is checked, which is set using `docker login`.
@@ -49,39 +49,39 @@ If the authorization state is not found there, $HOME/.docker/config.json is chec
 Note: You can also override the default path of the authentication file by setting the REGISTRY\_AUTH\_FILE
 environment variable. `export REGISTRY_AUTH_FILE=path`
 
-#### **--display**
+#### **\-\-display**
 
 Display the label's value of the image having populated its environment variables.
 The runlabel command will not execute if --display is specified.
 
-#### **--cert-dir**=*path*
+#### **\-\-cert-dir**=*path*
 
 Use certificates at *path* (\*.crt, \*.cert, \*.key) to connect to the registry.
 Default certificates directory is _/etc/containers/certs.d_. (This option is not available with the remote Podman client)
 
-#### **--creds**=*[username[:password]]*
+#### **\-\-creds**=*[username[:password]]*
 
 The [username[:password]] to use to authenticate with the registry if required.
 If one or both values are not supplied, a command line prompt will appear and the
 value can be entered.  The password is entered without echo.
 
-#### **--help**, **-h**
+#### **\-\-help**, **-h**
 Print usage statement
 
-#### **--name**, **-n**=*name*
+#### **\-\-name**, **-n**=*name*
 
 Use this name for creating content for the container. NAME will default to the IMAGENAME if it is not specified.
 
-#### **--quiet**, **-q**
+#### **\-\-quiet**, **-q**
 
 Suppress output information when pulling images
 
-#### **--replace**
+#### **\-\-replace**
 
 If a container exists of the default or given name, as needed it will be stopped, deleted and a new container will be
 created from this image.
 
-#### **--tls-verify**
+#### **\-\-tls-verify**
 
 Require HTTPS and verify certificates when contacting registries (default: true). If explicitly set to true,
 then TLS verification will be used. If set to false, then TLS verification will not be used. If not specified,