gh-101100: Fix some broken sphinx references (#107095)

Doc/howto/functional.rst

@@ -1072,8 +1072,8 @@ write the obvious :keyword:`for` loop::
 
 A related function is :func:`itertools.accumulate(iterable, func=operator.add)
 <itertools.accumulate>`.  It performs the same calculation, but instead of
-returning only the final result, :func:`accumulate` returns an iterator that
-also yields each partial result::
+returning only the final result, :func:`~itertools.accumulate` returns an iterator
+that also yields each partial result::
 
     itertools.accumulate([1, 2, 3, 4, 5]) =>
       1, 3, 6, 10, 15

Doc/howto/regex.rst

@@ -518,6 +518,8 @@ cache.
 Compilation Flags
 -----------------
 
+.. currentmodule:: re
+
 Compilation flags let you modify some aspects of how regular expressions work.
 Flags are available in the :mod:`re` module under two names, a long name such as
 :const:`IGNORECASE` and a short, one-letter form such as :const:`I`.  (If you're

Doc/howto/sorting.rst

@@ -273,7 +273,7 @@ Odds and Ends
 
 * The sort routines use ``<`` when making comparisons
   between two objects. So, it is easy to add a standard sort order to a class by
-  defining an :meth:`__lt__` method:
+  defining an :meth:`~object.__lt__` method:
 
   .. doctest::
 
@@ -281,8 +281,8 @@ Odds and Ends
     >>> sorted(student_objects)
     [('dave', 'B', 10), ('jane', 'B', 12), ('john', 'A', 15)]
 
-  However, note that ``<`` can fall back to using :meth:`__gt__` if
-  :meth:`__lt__` is not implemented (see :func:`object.__lt__`).
+  However, note that ``<`` can fall back to using :meth:`~object.__gt__` if
+  :meth:`~object.__lt__` is not implemented (see :func:`object.__lt__`).
 
 * Key functions need not depend directly on the objects being sorted. A key
   function can also access external resources. For instance, if the student grades

Doc/howto/unicode.rst

@@ -424,8 +424,8 @@ lowercase letters 'ss'.
 
 A second tool is the :mod:`unicodedata` module's
 :func:`~unicodedata.normalize` function that converts strings to one
-of several normal forms, where letters followed by a combining
-character are replaced with single characters.  :func:`normalize` can
+of several normal forms, where letters followed by a combining character are
+replaced with single characters.  :func:`~unicodedata.normalize` can
 be used to perform string comparisons that won't falsely report
 inequality if two strings use combining characters differently:
 
@@ -474,8 +474,8 @@ The Unicode Standard also specifies how to do caseless comparisons::
 
     print(compare_caseless(single_char, multiple_chars))
 
-This will print ``True``.  (Why is :func:`NFD` invoked twice?  Because
-there are a few characters that make :meth:`casefold` return a
+This will print ``True``.  (Why is :func:`!NFD` invoked twice?  Because
+there are a few characters that make :meth:`~str.casefold` return a
 non-normalized string, so the result needs to be normalized again. See
 section 3.13 of the Unicode Standard for a discussion and an example.)