add way for spell corrector to markup text

essay_set.py

@@ -37,6 +37,7 @@ class EssaySet(object):
         self._generated = []
         self._prompt = ""
         self._spelling_errors=[]
+        self._markup_text=[]
 
     def add_essay(self, essay_text, essay_score, essay_generated=0):
         """
@@ -62,9 +63,10 @@ class EssaySet(object):
                 cleaned_essay=cleaned_essay[0:MAXIMUM_ESSAY_LENGTH]
             self._text.append(cleaned_essay)
             # Spell correct text using aspell
-            cleaned_text,spell_errors=util_functions.spell_correct(self._text[len(self._text) - 1])
+            cleaned_text,spell_errors,markup_text=util_functions.spell_correct(self._text[len(self._text) - 1])
             self._clean_text.append(cleaned_text)
             self._spelling_errors.append(spell_errors)
+            self._markup_text.append(markup_text)
             # Tokenize text
             self._tokens.append(nltk.word_tokenize(self._clean_text[len(self._clean_text) - 1]))
             # Part of speech tag text

tests/tmpfile

-to replicate this experiment i would need to know how much vinegar to pour into the containers to insure each sample has to same amount to react to . i would need to also know which type of container to use .
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+ in order to replicate this experiment , we would need to know the temperature of the vinegar as well as how much vinegar to put in . both of these could vary and therefore change the result of the experiment . 
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tmpfile

-This is a well written string and everything is spelled correctly.
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+In order to replicate this experiment, I would need to know additional information such as the four different samples that they used (because I could have choosen metal, carbboard and many other sample materials that they didn't use and would get different results. Also I would also need to know the amount of vinegar to pour because this can caute a major change. Lastly, they might want to tell where to sit the samples while they dry for 30 minutes because if they are sitting in room temp. or by a light source makes a difference too.
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util_functions.py

@@ -83,11 +83,13 @@ def spell_correct(string):
                     incorrect_words.append(begword)
                     correct_spelling.append(sug)
     newstring = string
+    markup_string = string
     for i in range(0, len(incorrect_words)):
         sub_pat = r"\b" + incorrect_words[i] + r"\b"
         sub_comp = re.compile(sub_pat)
         newstring = re.sub(sub_comp, correct_spelling[i], newstring)
-    return newstring,len(incorrect_words)
+        markup_string=re.sub(sub_comp,"[[" + correct_spelling[i] + "]]", markup_string)
+    return newstring,len(incorrect_words),markup_string
 
 
 def ngrams(tokens, min_n, max_n):