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, 2 insertions, 2 deletions

diff --git a/docs/source/markdown/podman-generate-kube.1.md b/docs/source/markdown/podman-generate-kube.1.md
index 0e5a31ae6..90b4c59fb 100644
--- a/docs/source/markdown/podman-generate-kube.1.md
+++ b/docs/source/markdown/podman-generate-kube.1.md
@@ -18,11 +18,11 @@ Note that the generated Kubernetes YAML file can be used to re-run the deploymen
 
 ## OPTIONS
 
-#### **--filename**, **-f**=**filename**
+#### **\-\-filename**, **-f**=**filename**
 
 Output to the given file, instead of STDOUT. If the file already exists, `generate kube` will refuse to replace it and return an error.
 
-#### **--service**, **-s**
+#### **\-\-service**, **-s**
 
 Generate a Kubernetes service object in addition to the Pods. Used to generate a Service specification for the corresponding Pod output. In particular, if the object has portmap bindings, the service specification will include a NodePort declaration to expose the service. A
 random port is assigned by Podman in the specification.