Autogenerate missing docs (#3514)

* Autogenerate missing docs

* Update ansi.md

* Rename question mark command docs

* Delete empty?.md

docs/commands/url-host.md

@@ -0,0 +1,20 @@
+# url host
+gets the host of a url
+
+## Usage
+```shell
+> url host ...args {flags} 
+ ```
+
+## Parameters
+* ...args: optionally operate by column path
+
+## Flags
+* -h, --help: Display this help message
+
+## Examples
+  Get host of a url
+```shell
+> echo 'http://www.example.com/foo/bar' | url host
+ ```
+