Accidental if instead of a block

I don't know if we can improve this but I hit this syntax error today when writing rspec:

Unmatched keyword, missing `end' ?
  2  describe "something" do
> 3    if "does something" do
> 5    end
  6  end
/tmp/scratchrb:3: syntax error, unexpected `do', expecting `then' or ';' or '\n' (SyntaxError)
  if "does something" do
                      ^~

(I used if instead of it).

Both if and do need an end. I think we could explain this better. In this case the original error says "unexpected do', expecting then' or ';' or '\n'". Perhaps as we're trying to explain the problem we should verify that the syntax error of our captured block matches the syntax error of the document, do something differently.

Generated by this code:

describe "something" do
  if "does something" do
    print "foo"
  end
end

Start by reproducing the provided Ruby snippet and compare its original syntax error with syntax_suggest's explanation. Trace the handling of this captured block and determine how the reported do error should be distinguished from the surrounding missing end; done means the tool gives a clearer explanation for this if-instead-of-it case.