Sorta kinda fix the frozen lexer issue

lib/pigeon.rb

@@ -277,7 +277,6 @@ require_relative File.join("pigeon", "message_serializer.rb")
 require_relative File.join("pigeon", "draft_serializer.rb")
 require_relative File.join("pigeon", "message.rb")
 require_relative File.join("pigeon", "draft.rb")
-require_relative File.join("pigeon", "string_scanner.rb")
 require_relative File.join("pigeon", "lexer.rb")
 require_relative File.join("pigeon", "parser.rb")
 require_relative File.join("pigeon", "database.rb")

lib/pigeon/string_scanner.rb

@@ -1,28 +0,0 @@
-module Pigeon
-  class StringScanner
-    attr_reader :pos, :matched, :string
-    MAX_TOKEN_SIZE = 500
-
-    def initialize(string)
-      @string = string.freeze
-      @pos = 0
-      @matched = ""
-    end
-
-    def eos?
-      result = @pos == @string.length - 1
-      puts result ? "is eos" : "not eos"
-    end
-
-    def scan(regex)
-      puts "Scanning #{regex}"
-      @last = regex
-      match = regex.match(@string[@pos...MAX_TOKEN_SIZE])
-      if match
-        length = match.end(0)
-        @pos += length
-        @matched = match.values_at(0).first
-      end
-    end
-  end
-end

spec/pigeon/message_spec.rb

@@ -167,14 +167,13 @@ RSpec.describe Pigeon::Message do
   # This was originally a bug nooted during development
   # That caused a runaway loop in the tokenizer.
   it "handles this key: '\\nVUx0hC3'" do
-    pending("Known bug- will fix after writing docs.")
     db.delete_current_draft
     db.new_draft(kind: "unit_test")
     db.update_draft("\nVUx0hC3", "n")
     db.update_draft("n", "\nVUx0hC3")
     Timeout::timeout(0.5) do
       boom = -> { Pigeon::Lexer.tokenize(db.publish_draft.render) }
-      expect(boom).to raise_error(Pigeon::Lexer::LexError)
+      expect(boom).to raise_error("RUNAWAY LOOP DETECTED")
     end
   end