Remove many "versionchanged" items that didn't use the official markup,
but just some text embedded in the docs.
Also remove paragraph about implicit relative imports from tutorial.
diff --git a/Doc/c-api/marshal.rst b/Doc/c-api/marshal.rst
index e7b5c13..6d9879c 100644
--- a/Doc/c-api/marshal.rst
+++ b/Doc/c-api/marshal.rst
@@ -13,9 +13,9 @@
Numeric values are stored with the least significant byte first.
The module supports two versions of the data format: version 0 is the historical
-version, version 1 (new in Python 2.4) shares interned strings in the file, and
-upon unmarshalling. *Py_MARSHAL_VERSION* indicates the current file format
-(currently 1).
+version, version 1 shares interned strings in the file, and upon unmarshalling.
+Version 2 uses a binary format for floating point numbers.
+*Py_MARSHAL_VERSION* indicates the current file format (currently 2).
.. cfunction:: void PyMarshal_WriteLongToFile(long value, FILE *file, int version)