- Issue #6939: Fix file I/O objects in the `io` module to keep the original
file position when calling `truncate()`. It would previously change the
file position to the given argument, which goes against the tradition of
ftruncate() and other truncation APIs. Patch by Pascal Chambon.
diff --git a/Modules/_io/iobase.c b/Modules/_io/iobase.c
index 3732f46..3344847 100644
--- a/Modules/_io/iobase.c
+++ b/Modules/_io/iobase.c
@@ -102,8 +102,8 @@
PyDoc_STRVAR(iobase_truncate_doc,
"Truncate file to size bytes.\n"
"\n"
- "Size defaults to the current IO position as reported by tell(). Return\n"
- "the new size.");
+ "File pointer is left unchanged. Size defaults to the current IO\n"
+ "position as reported by tell(). Returns the new size.");
static PyObject *
iobase_truncate(PyObject *self, PyObject *args)