Raise memory expectation in test slightly

lib/twitter_ebooks/model.rb

@@ -96,7 +96,7 @@ module Ebooks
       end
       self
     end
-     
+
 
     def initialize
       @tokens = []
@@ -113,7 +113,7 @@ module Ebooks
         return @tikis[token]
       else
         (@tokens.length+1)%1000 == 0 and puts "#{@tokens.length+1} tokens"
-        @tokens << token 
+        @tokens << token
         return @tikis[token] = @tokens.length-1
       end
     end

spec/model_spec.rb

@@ -36,7 +36,7 @@ describe Ebooks::Model do
     report2 = MemoryUsage.report do
       model = Ebooks::Model.load(file.path)
     end
-    expect(report2.total_memsize).to be < 3000000
+    expect(report2.total_memsize).to be < 4000000
 
     expect(model.tokens[0]).to be_a String
     expect(model.sentences[0][0]).to be_a Fixnum