Patch #837322: Clarify owning, borrowing, stealing. Backported to 2.3.
diff --git a/Doc/api/intro.tex b/Doc/api/intro.tex
index ccbe686..364487d 100644
--- a/Doc/api/intro.tex
+++ b/Doc/api/intro.tex
@@ -169,12 +169,16 @@
\subsubsection{Reference Count Details \label{refcountDetails}}
The reference count behavior of functions in the Python/C API is best
-explained in terms of \emph{ownership of references}. Note that we
-talk of owning references, never of owning objects; objects are always
-shared! When a function owns a reference, it has to dispose of it
-properly --- either by passing ownership on (usually to its caller) or
-by calling \cfunction{Py_DECREF()} or \cfunction{Py_XDECREF()}. When
-a function passes ownership of a reference on to its caller, the
+explained in terms of \emph{ownership of references}. Ownership
+pertains to references, never to objects (objects are not owned: they
+are always shared). "Owning a reference" means being responsible for
+calling Py_DECREF on it when the reference is no longer needed.
+Ownership can also be transferred, meaning that the code that receives
+ownership of the reference then becomes responsible for eventually
+decref'ing it by calling \cfunction{Py_DECREF()} or
+\cfunction{Py_XDECREF()} when it's no longer needed --or passing on
+this responsibility (usually to its caller).
+When a function passes ownership of a reference on to its caller, the
caller is said to receive a \emph{new} reference. When no ownership
is transferred, the caller is said to \emph{borrow} the reference.
Nothing needs to be done for a borrowed reference.