small bugfix

Author: Onvember

doc/book/box/data_model.rst

@@ -386,7 +386,8 @@ Full information is in section
     | ``'string'``                   | :ref:`string <index-box_string>`          | TREE, BITSET or HASH                 |
     | (may also be called ``‘str’``) |                                           |                                      |
     +--------------------------------+-------------------------------------------+--------------------------------------+
-    | ``'varbinary'``                | :ref:`varbinary <index-box_bin>`          | TREE, BITSET or HASH                 |
+    | ``'varbinary'``                | :ref:`varbinary <index-box_bin>`          | TREE, HASH or BITSET                 |
+    |                                |                                           | (since version 2.7)                  |
     +--------------------------------+-------------------------------------------+--------------------------------------+
     | ``'uuid'``                     | :ref:`uuid <index-box_uuid>`              | TREE or HASH                         |
     +--------------------------------+-------------------------------------------+--------------------------------------+

doc/book/box/indexes.rst

@@ -181,8 +181,8 @@ Use HASH index:
 
 * if it is a secondary key
 * if you 100% won't need to make it non-unique
-* if you really need that 2-5% performance improvement
-* if you have taken measurements on your data and you see an increase in performance
+* if you have taken measurements on your data and you see an accountable
+  increase in performance
 * if you save every byte on tuples (HASH is a little more compact)
 
 .. _indexes-rtree:
@@ -644,5 +644,5 @@ And :doc:`insert </reference/reference_lua/box_space/insert>` another tuple:
     :class: fact
 
     You can add, drop, or alter the definitions at runtime, with some restrictions.
-    Read more in section :ref:`index operations <index-box_index-operations>`
-    and in reference for :doc:`box.index submodule </reference/reference_lua/box_index>`.
+    Read more about index operations in reference for
+    :doc:`box.index submodule </reference/reference_lua/box_index>`.

doc/reference/reference_lua/box_space/create_index.rst

@@ -172,7 +172,7 @@ and what index types are allowed.
         :header-rows: 1
 
         *   - Index field type
-            - What can be it it
+            - What can be in it
             - Where it is legal
             - Examples
 
@@ -201,7 +201,7 @@ and what index types are allowed.
               <limitations_bytes_in_index_key>`. A varbinary byte sequence
               does not have a :ref:`collation <index-collation>`
               because its contents are not UTF-8 characters
-            - memtx TREE or HASH indexes;
+            - memtx TREE, HASH or BITSET (since version 2.7) indexes;
 
               vinyl TREE indexes
             - '\\65 \\66 \\67'