documentation recommends scm_new_smob instead of SCM_NEWSMOB

* doc/ref/api-smobs.texi (Smobs): Document scm_new_smob and
  scm_new_double_smob instead of the SCM_NEWSMOB / SCM_RETURN_NEWSMOB
  family of macros.

* doc/ref/libguile-smobs.texi (Creating Smob Instances): Use
  scm_new_smob.

doc/ref/api-smobs.texi

@@ -1,6 +1,6 @@
 @c -*-texinfo-*-
 @c This is part of the GNU Guile Reference Manual.
-@c Copyright (C)  1996, 1997, 2000, 2001, 2002, 2003, 2004, 2009
+@c Copyright (C)  1996, 1997, 2000, 2001, 2002, 2003, 2004, 2009, 2013
 @c   Free Software Foundation, Inc.
 @c See the file guile.texi for copying conditions.
 
@@ -129,12 +129,10 @@ Return true iff @var{exp} is a smob instance of the type indicated by
 so it shouldn't contain any side effects.
 @end deftypefn
 
-@deftypefn {C Macro} void SCM_NEWSMOB (SCM value, scm_t_bits tag, void *data)
+@deftypefn {C Function} SCM scm_new_smob (scm_t_bits tag, void *data)
-@deftypefnx {C Macro} void SCM_NEWSMOB2 (SCM value, scm_t_bits tag, void *data, void *data2)
+@deftypefnx {C Function} SCM scm_new_double_smob (scm_t_bits tag, void *data, void *data2, void *data3)
-@deftypefnx {C Macro} void SCM_NEWSMOB3 (SCM value, scm_t_bits tag, void *data, void *data2, void *data3)
+Make a new smob of the type with tag @var{tag} and smob data @var{data},
-Make @var{value} contain a smob instance of the type with tag
+@var{data2}, and @var{data3}, as appropriate.
-@var{tag} and smob data @var{data}, @var{data2}, and @var{data3}, as
-appropriate.
 
 The @var{tag} is what has been returned by @code{scm_make_smob_type}.
 The initial values @var{data}, @var{data2}, and @var{data3} are of
@@ -145,20 +143,6 @@ by using @code{SCM_UNPACK}.
 The flags of the smob instance start out as zero.
 @end deftypefn
 
-Since it is often the case (e.g., in smob constructors) that you will
-create a smob instance and return it, there is also a slightly specialized
-macro for this situation:
-
-@deftypefn {C Macro} {} SCM_RETURN_NEWSMOB (scm_t_bits tag, void *data)
-@deftypefnx {C Macro} {} SCM_RETURN_NEWSMOB2 (scm_t_bits tag, void *data1, void *data2)
-@deftypefnx {C Macro} {} SCM_RETURN_NEWSMOB3 (scm_t_bits tag, void *data1, void *data2, void *data3)
-This macro expands to a block of code that creates a smob instance of
-the type with tag @var{tag} and smob data @var{data}, @var{data2}, and
-@var{data3}, as with @code{SCM_NEWSMOB}, etc., and causes the
-surrounding function to return that @code{SCM} value.  It should be
-the last piece of code in a block.
-@end deftypefn
-
 @deftypefn {C Macro} scm_t_bits SCM_SMOB_FLAGS (SCM obj)
 Return the 16 extra bits of the smob @var{obj}.  No meaning is
 predefined for these bits, you can use them freely.

doc/ref/libguile-smobs.texi

@@ -1,6 +1,6 @@
 @c -*-texinfo-*-
 @c This is part of the GNU Guile Reference Manual.
-@c Copyright (C)  1996, 1997, 2000, 2001, 2002, 2003, 2004, 2005, 2010, 2011
+@c Copyright (C)  1996, 1997, 2000, 2001, 2002, 2003, 2004, 2005, 2010, 2011, 2013
 @c   Free Software Foundation, Inc.
 @c See the file guile.texi for copying conditions.
 
@@ -180,7 +180,7 @@ Initialize these fields with @code{SCM_BOOL_F}.
 A valid state is one that can be safely acted upon by the @emph{mark}
 and @emph{free} functions of your smob type.
 @item
-Create the smob using @code{SCM_NEWSMOB}, passing it the initialized
+Create the smob using @code{scm_new_smob}, passing it the initialized
 memory block.  (This step will always succeed.)
 @item
 Complete the initialization of the memory block by, for example,
@@ -223,7 +223,7 @@ make_image (SCM name, SCM s_width, SCM s_height)
 
   /* Step 3: Create the smob.
    */
-  SCM_NEWSMOB (smob, image_tag, image);
+  smob = scm_new_smob (image_tag, image);
 
   /* Step 4: Finish the initialization.
    */
@@ -254,7 +254,7 @@ After it, @var{smob} contains a valid smob that is properly initialized
 and protected, and in turn can properly protect the Scheme values in its
 @var{image} struct.
 
-But before the smob is completely created, @code{SCM_NEWSMOB} might
+But before the smob is completely created, @code{scm_new_smob} might
 cause the garbage collector to run.  During this garbage collection, the
 @code{SCM} values in the @var{image} struct would be invisible to Guile.
 It only gets to know about them via the @code{mark_image} function, but
@@ -530,13 +530,11 @@ four-word cells, which are appropriately called @dfn{double cells}.
 You can use them for @dfn{double smobs} and get two more immediate
 words of type @code{scm_t_bits}.
 
-A double smob is created with @code{SCM_NEWSMOB2} or
+A double smob is created with @code{scm_new_double_smob}.  Its immediate
-@code{SCM_NEWSMOB3} instead of @code{SCM_NEWSMOB}.  Its immediate
+words can be retrieved as @code{scm_t_bits} with @code{SCM_SMOB_DATA_2}
-words can be retrieved as @code{scm_t_bits} with
+and @code{SCM_SMOB_DATA_3} in addition to @code{SCM_SMOB_DATA}.
-@code{SCM_SMOB_DATA_2} and @code{SCM_SMOB_DATA_3} in addition to
+Unsurprisingly, the words can be set to @code{scm_t_bits} values with
-@code{SCM_SMOB_DATA}.  Unsurprisingly, the words can be set to
+@code{SCM_SET_SMOB_DATA_2} and @code{SCM_SET_SMOB_DATA_3}.
-@code{scm_t_bits} values with @code{SCM_SET_SMOB_DATA_2} and
-@code{SCM_SET_SMOB_DATA_3}.
 
 Of course there are also @code{SCM_SMOB_OBJECT_2},
 @code{SCM_SMOB_OBJECT_3}, @code{SCM_SET_SMOB_OBJECT_2}, and
@@ -599,7 +597,7 @@ make_image (SCM name, SCM s_width, SCM s_height)
 
   /* Step 3: Create the smob.
    */
-  SCM_NEWSMOB (smob, image_tag, image);
+  smob = scm_new_smob (image_tag, image);
 
   /* Step 4: Finish the initialization.
    */