Wrap line width to 79 characters

Author: George-Ogden

Doc/library/ast.rst

@@ -364,7 +364,9 @@ Literals
      This has the same meaning as ``FormattedValue.value``.
    * ``str`` is a constant containing the text of the interpolation expression.
 
-     If ``str`` is set to ``None``, then ``value`` is used to generate code when calling :func:`ast.unparse`. This no longer guarantees that the generated code is identical to the original and is intended for code generation.
+     If ``str`` is set to ``None``, then ``value`` is used to generate code
+when calling :func:`ast.unparse`. This no longer guarantees that the generated
+code is identical to the original and is intended for code generation.
    * ``conversion`` is an integer:
 
      * -1: no conversion