More docstring corrections.

lib/python/Products/ZCTextIndex/IIndex.py

@@ -25,7 +25,7 @@ class IIndex(Interface.Base):
     def search(term):
         """Execute a search on a single term given as a string.
 
-        Return an IIBucket mapping docid to score, or None if all docs
+        Return an IIBTree mapping docid to score, or None if all docs
         match due to the lexicon returning no wids for the term (e.g.,
         if the term is entirely composed of stopwords).
         """
@@ -33,7 +33,7 @@ class IIndex(Interface.Base):
     def search_phrase(phrase):
         """Execute a search on a phrase given as a string.
 
-        Return an IIBucket.
+        Return an IIBtree mapping docid to score.
         """
 
     def search_glob(pattern):
@@ -45,7 +45,7 @@ class IIndex(Interface.Base):
 
         NOTE: Currently only a single trailing * is supported.
 
-        Return an IIBucket.
+        Return an IIBTree mapping docid to score.
         """
 
     def query_weight(terms):