Fixes syntax

Author: AArdeev

doc/reference/reference_lua/box_index/parts.rst

@@ -25,21 +25,21 @@ index_object.parts
 
     ..  code-block:: lua
 
-            box.schema.space.create('T')
-            i = box.space.T:create_index('I', {parts={3, 'string', 1, 'unsigned'}})
-            box.space.T:insert{1, 99.5, 'X', nil, 99.5}
-            i.parts:extract_key(box.space.T:get({'X', 1}))
+        box.schema.space.create('T')
+        i = box.space.T:create_index('I', {parts={3, 'string', 1, 'unsigned'}})
+        box.space.T:insert{1, 99.5, 'X', nil, 99.5}
+        i.parts:extract_key(box.space.T:get({'X', 1}))
 
     **``key_def`` equivalent**
 
-        ..  code-block:: lua
+    ..  code-block:: lua
 
-            key_def = require('key_def')
-            box.schema.space.create('T')
-            i = box.space.T:create_index('I', {parts={3, 'string', 1, 'unsigned'}})
-            box.space.T:insert{1, 99.5, 'X', nil, 99.5}
-            k = key_def.new(i.parts)
-            k:extract_key(box.space.T:get({'X', 1}))
+        key_def = require('key_def')
+        box.schema.space.create('T')
+        i = box.space.T:create_index('I', {parts={3, 'string', 1, 'unsigned'}})
+        box.space.T:insert{1, 99.5, 'X', nil, 99.5}
+        k = key_def.new(i.parts)
+        k:extract_key(box.space.T:get({'X', 1}))
 
     The outcome of the methods calling is described in :ref:`key_def_object <key_def_object>`.