no line breaks in docs-snippet tag

ember-code-snippet won't pick up a multi-line opening tag. that's 
probably an issue with ember-code-snippet, but for now this fixes the 
rendering on this template

Author: Brian Whitton

tests/dummy/app/pods/docs/components/docs-snippet/demo4/template.hbs

@@ -1,8 +1,5 @@
 <div class='docs-my-8'>
-  {{#docs-snippet
-    name='docs-snippet-title-example.js'
-    title='app/components/my-component.js'
-  }}
+  {{#docs-snippet name='docs-snippet-title-example.hbs' title='app/components/my-component.js' showCopy=false language='javascript'}}
     import Component from '@ember/component';
     export default Component.extend({
       // ...