test-repo/tests/glimmer/block-statement.hbs

{{#block param hashKey=hashValue as |blockParam|}}
  Hello
{{/block}}

{{#block almost80CharacterLongPositionalParamThatIsFirstAlmost80Chars helloWorldParam key=here}}
{{/block}}

{{#block param param param param param param param hashKey=hashValue as |blockParam|}}
  Hello
{{/block}}

{{#block param param param param param param param hashKey=HashValue hashKey=hashValue}}
  Hello
{{/block}}

{{#block param param param param param param param param param param param param param}}
  Hello
{{/block}}

{{#block hashKey=HashValue hashKey=hashValue hashKey=HashValue hashKey=hashValue hashKey=HashValue}}
  Hello
{{/block}}

{{#block}}
  {{#block}}
   hello
  {{/block}}
{{/block}}

{{#block}}
  {{#block param}}
    hello
  {{/block}}
{{/block}}

{{#block param}}
  {{#block param}}
    hello
  {{/block}}
{{/block}}

{{#block}}
  hello
{{/block}}

<MyComponent as |firstName|>
  {{firstName}}
</MyComponent>

<MyComponent as |firstName lastName|>
  {{firstName}} {{lastName}}
</MyComponent>