The html rendered from markdown would look like:
`<h3>be<em>grouped</em>into</h3>`
When there is only one `_` the html rendered correctly:
`<h3>be_directory</h3>`
This change escapes the `_` when there are multiple.
* New markdown: `### be\_grouped\_into`
* New html: `<h3>be_grouped_into</h3>`
resource matchers fixed:
* be_block_device
* be_character_device
* be_grouped_into
* be_linked_to
* be_owned_by
* have_app_pool
* have_property_value
resource fixed:
* parse_config_file
Signed-off-by: Nathen Harvey <nharvey@chef.io>