[BUG] Error when block only has comment statements it produces invalid Bash code

[Ph0enixKM]

Describe the bug
When a Block (the syntax module modules/block.rs) parses any positive amount of comments without any other statements, it does not insert a noop command :. Comments are not commands that Bash parses, so it omits all of them and looks for some command. If none found - it fails, which is an unwanted behaviour. To mitigate the problem, Bash developers use so called noop operator (:) that does nothing.

To Reproduce
Write a loop, if statement or function declaration with a block that only contains comment(s).

Expected behavior
Block

{
  // Comment 1
  // Comment 2
}

Should compile to

{
  # Comment 1
  # Comment 2
  :
}