If statement incorrectly parses "end" as a keyword

[AnrichVS]

Hi,

Consider this ERB content:

<% if 'This is a string with the end keyword in it' %>
Content
<% end %>

I would expect this to parse fine. However, it seems that the "end" within the string is detected as an actual end keyword.

Erbse::Engine.new.call("<% if 'This is a string with the end keyword in it' %> Content  <% end %>")
NoMethodError: undefined method `<<' for nil:NilClass
from /usr/local/bundle/gems/erbse-0.1.4/lib/erbse/parser.rb:38:in `block in call'

It's not just within strings, but anything with "end" in it, for example and object of a class that defines an end method:

<% if some_object.end %>
Content
<% end %>

The issue is that buffers is an empty array on this line:

erbse/lib/erbse/parser.rb

Line 33 in e36b5fa

buffers.last << [:static, "#{text}\n"] << [:newline]