Further ast/dis documentation cleanup

Author: davepeck

Doc/library/ast.rst

@@ -324,6 +324,7 @@ Literals
                             values=[
                                 Constant(value='.3')]))]))
 
+
 .. class:: TemplateStr(values)
 
    A t-string, comprising a series of :class:`Interpolation` and :class:`Constant`
@@ -348,6 +349,8 @@ Literals
                             values=[
                                 Constant(value='ordinal')]))]))
 
+   .. versionadded:: 3.14
+
 
 .. class:: Interpolation(value, str, conversion, format_spec)
 
@@ -367,6 +370,8 @@ Literals
      of the value, or ``None`` if no format was specified. Both
      ``conversion`` and ``format_spec`` can be set at the same time.
 
+   .. versionadded:: 3.14
+
 
 .. class:: List(elts, ctx)
            Tuple(elts, ctx)

Doc/library/dis.rst

@@ -1139,6 +1139,9 @@ iterations of the loop.
    expression and its source text and pushes the resulting instance onto the
    stack.
 
+   If no conversion or format specification is present, ``format`` is set to
+   ``2``.
+
    If the low bit of ``format`` is set, it indicates that the interpolation
    contains a format specification.
 
@@ -1147,11 +1150,11 @@ iterations of the loop.
    (e.g. ``0`` for no conversion, ``1`` for ``!s``, ``2`` for ``!r``, and
    ``3`` for ``!a``)::
 
+      conversion = format >> 2
       if format & 1:
           format_spec = STACK.pop()
       else:
           format_spec = None
-      conversion = format >> 2
       expression = STACK.pop()
       value = STACK.pop()
       STACK.append(_build_interpolation(value, expression, conversion, format_spec))