A number of small adjustments.

Doc/api/concrete.tex

@@ -1370,7 +1370,7 @@ against an object's buffer interface, returning data from the target
 object.
 
 More information on the buffer interface is provided in the section
-``Buffer Object Structures'' (section \ref{buffer-structs}), under
+``Buffer Object Structures'' (section~\ref{buffer-structs}), under
 the description for \ctype{PyBufferProcs}\ttindex{PyBufferProcs}.
 
 A ``buffer object'' is defined in the \file{bufferobject.h} header
@@ -1857,6 +1857,7 @@ def PyDict_MergeFromSeq2(a, seq2, override):
   \versionadded{2.2}
 \end{cfuncdesc}
 
+
 \section{Other Objects \label{otherObjects}}
 
 \subsection{File Objects \label{fileObjects}}
@@ -2188,8 +2189,11 @@ returned.
 
 \subsection{Descriptor Objects \label{descriptor-objects}}
 
+``Descriptors'' are objects that describe some attribute of an object.
+They are found in the dictionary of type objects.
+
 \begin{cvardesc}{PyTypeObject}{PyProperty_Type}
-  The type object for a descriptor.
+  The type object for the built-in descriptor types.
   \versionadded{2.2}
 \end{cvardesc}
 
@@ -2323,7 +2327,7 @@ acts as a proxy for the original object as much as it can.
 
 \obindex{CObject}
 Refer to \emph{Extending and Embedding the Python Interpreter},
-section 1.12 (``Providing a C API for an Extension Module), for more
+section~1.12, ``Providing a C API for an Extension Module,'' for more
 information on using these objects.
 
 
@@ -2341,7 +2345,7 @@ information on using these objects.
 \end{cfuncdesc}
 
 \begin{cfuncdesc}{PyObject*}{PyCObject_FromVoidPtr}{void* cobj,
-	                                            void (*destr)(void *)}
+                                                    void (*destr)(void *)}
   Creates a \ctype{PyCObject} from the \code{void *}\var{cobj}.  The
   \var{destr} function will be called when the object is reclaimed,
   unless it is \NULL.
@@ -2378,6 +2382,10 @@ itself.  This de-referencing of the cell object requires support from
 the generated byte-code; these are not automatically de-referenced
 when accessed.  Cell objects are not likely to be useful elsewhere.
 
+\begin{ctypedesc}{PyCellObject}
+  The C structure used for cell objects.
+\end{ctypedesc}
+
 \begin{cvardesc}{PyTypeObject}{PyCell_Type}
   The type object corresponding to cell objects
 \end{cvardesc}