Fix formatting {% verbatim do %} ... {% end %} outside macro

[makenowjust]

This script crashes crystal tool format:

p!(
  {% verbatim do %}
    1
    {{2}}
    3
  {% end %}
)

$ crystal tool format foo.cr
Error: couldn't format 'foo.cr', please report a bug including the contents of it: https://github.com/crystal-lang/crystal/issues

expecting MACRO_CONTROL_START, not `{%, `, at :2:3 (Exception)
  from Crystal::Formatter#check<Symbol>:Nil
  from Crystal::ASTNode+@Crystal::ASTNode#accept<Crystal::Formatter>:(Bool | Nil)
  from Crystal::Formatter#format_args_simple<Array(Crystal::ASTNode+), Int32, Bool>:Tuple(Bool, Bool, Int32)
  from Crystal::Formatter#format_args<Array(Crystal::ASTNode+), Bool, (Array(Crystal::NamedArgument) | Nil), (Crystal::ASTNode+ | Nil), Int32, Bool>:Tuple(Bool | Nil, Bool, Int32)
  from Crystal::Formatter#visit<Crystal::Call>:Bool
  from Crystal::ASTNode+@Crystal::ASTNode#accept<Crystal::Formatter>:(Bool | Nil)
  from Crystal::format<String, String>:String
  from Crystal::Command#tool:(Bool | Nil)
  from Crystal::Command#run:(Bool | Crystal::Compiler::Result | Nil)
  from main

This PR fixes it.

[sdogruyol]

Thank you @makenowjust 👍