Cleanup: unify struct declaration style for Python types, update names

Use struct identifiers in comments before the value.
This has some advantages:

- The struct identifiers didn't mix well with other code-comments,
  where other comments were wrapped onto the next line.
- Minor changes could re-align all other comments in the struct.
- PyVarObject_HEAD_INIT & tp_name are no longer placed on the same line.

Remove overly verbose comments copied from PyTypeObject (Python v2.x),
these aren't especially helpful and get outdated.

Also corrected some outdated names:

- PyTypeObject.tp_print -> tp_vectorcall_offset
- PyTypeObject.tp_reserved -> tp_as_async

source/blender/python/intern/bpy_library_load.c

@@ -84,82 +84,55 @@ static void bpy_lib_dealloc(BPy_Library *self)
 }
 
 static PyTypeObject bpy_lib_Type = {
-    PyVarObject_HEAD_INIT(NULL, 0) "bpy_lib", /* tp_name */
-    sizeof(BPy_Library),                      /* tp_basicsize */
-    0,                                        /* tp_itemsize */
-    /* methods */
-    (destructor)bpy_lib_dealloc, /* tp_dealloc */
-    0,                           /* tp_vectorcall_offset */
-    NULL,                        /* getattrfunc tp_getattr; */
-    NULL,                        /* setattrfunc tp_setattr; */
-    NULL,
-    /* tp_compare */ /* DEPRECATED in python 3.0! */
-    NULL,            /* tp_repr */
-
-    /* Method suites for standard classes */
-
-    NULL, /* PyNumberMethods *tp_as_number; */
-    NULL, /* PySequenceMethods *tp_as_sequence; */
-    NULL, /* PyMappingMethods *tp_as_mapping; */
-
-    /* More standard operations (here for binary compatibility) */
-
-    NULL, /* hashfunc tp_hash; */
-    NULL, /* ternaryfunc tp_call; */
-    NULL, /* reprfunc tp_str; */
-
-    /* Will only use these if this is a sub-type of a Python class. */
-    PyObject_GenericGetAttr, /* getattrofunc tp_getattro; */
-    NULL,                    /* setattrofunc tp_setattro; */
-
-    /* Functions to access object as input/output buffer */
-    NULL, /* PyBufferProcs *tp_as_buffer; */
-
-    /*** Flags to define presence of optional/expanded features ***/
-    Py_TPFLAGS_DEFAULT, /* long tp_flags; */
-
-    NULL, /*  char *tp_doc;  Documentation string */
-    /*** Assigned meaning in release 2.0 ***/
-    /* call function for all accessible objects */
-    NULL, /* traverseproc tp_traverse; */
-
-    /* delete references to contained objects */
-    NULL, /* inquiry tp_clear; */
-
-    /***  Assigned meaning in release 2.1 ***/
-    /*** rich comparisons (subclassed) ***/
-    NULL, /* richcmpfunc tp_richcompare; */
-
-    /***  weak reference enabler ***/
-    0,
-    /*** Added in release 2.2 ***/
-    /*   Iterators */
-    NULL, /* getiterfunc tp_iter; */
-    NULL, /* iternextfunc tp_iternext; */
-
-    /*** Attribute descriptor and subclassing stuff ***/
-    bpy_lib_methods,             /* struct PyMethodDef *tp_methods; */
-    NULL,                        /* struct PyMemberDef *tp_members; */
-    NULL,                        /* struct PyGetSetDef *tp_getset; */
-    NULL,                        /* struct _typeobject *tp_base; */
-    NULL,                        /* PyObject *tp_dict; */
-    NULL,                        /* descrgetfunc tp_descr_get; */
-    NULL,                        /* descrsetfunc tp_descr_set; */
-    offsetof(BPy_Library, dict), /* long tp_dictoffset; */
-    NULL,                        /* initproc tp_init; */
-    NULL,                        /* allocfunc tp_alloc; */
-    NULL,                        /* newfunc tp_new; */
-    /*  Low-level free-memory routine */
-    NULL, /* freefunc tp_free; */
-    /* For PyObject_IS_GC */
-    NULL, /* inquiry tp_is_gc; */
-    NULL, /* PyObject *tp_bases; */
-    /* method resolution order */
-    NULL, /* PyObject *tp_mro; */
-    NULL, /* PyObject *tp_cache; */
-    NULL, /* PyObject *tp_subclasses; */
-    NULL, /* PyObject *tp_weaklist; */
-    NULL,
+    PyVarObject_HEAD_INIT(NULL, 0)
+    /*tp_name*/ "bpy_lib",
+    /*tp_basicsize*/ sizeof(BPy_Library),
+    /*tp_itemsize*/ 0,
+    /*tp_dealloc*/ (destructor)bpy_lib_dealloc,
+    /*tp_vectorcall_offset*/ 0,
+    /*tp_getattr*/ NULL,
+    /*tp_setattr*/ NULL,
+    /*tp_as_async*/ NULL,
+    /*tp_repr*/ NULL,
+    /*tp_as_number*/ NULL,
+    /*tp_as_sequence*/ NULL,
+    /*tp_as_mapping*/ NULL,
+    /*tp_hash*/ NULL,
+    /*tp_call*/ NULL,
+    /*tp_str*/ NULL,
+    /*tp_getattro*/ PyObject_GenericGetAttr,
+    /*tp_setattro*/ NULL,
+    /*tp_as_buffer*/ NULL,
+    /*tp_flags*/ Py_TPFLAGS_DEFAULT,
+    /*tp_doc*/ NULL,
+    /*tp_traverse*/ NULL,
+    /*tp_clear*/ NULL,
+    /*tp_richcompare*/ NULL,
+    /*tp_weaklistoffset*/ 0,
+    /*tp_iter*/ NULL,
+    /*tp_iternext*/ NULL,
+    /*tp_methods*/ bpy_lib_methods,
+    /*tp_members*/ NULL,
+    /*tp_getset*/ NULL,
+    /*tp_base*/ NULL,
+    /*tp_dict*/ NULL,
+    /*tp_descr_get*/ NULL,
+    /*tp_descr_set*/ NULL,
+    /*tp_dictoffset*/ offsetof(BPy_Library, dict),
+    /*tp_init*/ NULL,
+    /*tp_alloc*/ NULL,
+    /*tp_new*/ NULL,
+    /*tp_free*/ NULL,
+    /*tp_is_gc*/ NULL,
+    /*tp_bases*/ NULL,
+    /*tp_mro*/ NULL,
+    /*tp_cache*/ NULL,
+    /*tp_subclasses*/ NULL,
+    /*tp_weaklist*/ NULL,
+    /*tp_del*/ NULL,
+    /*tp_version_tag*/ 0,
+    /*tp_finalize*/ NULL,
+    /*tp_vectorcall*/ NULL,
 };
 
 PyDoc_STRVAR(