Apply suggestions from code review

Co-authored-by: Stan Ulbrych <[email protected]>

Author: encukou

Doc/library/sqlite3.rst

@@ -31,7 +31,7 @@ PostgreSQL or Oracle.
 
 The :mod:`!sqlite3` module was written by Gerhard Häring.  It provides an SQL interface
 compliant with the DB-API 2.0 specification described by :pep:`249`, and
-requires SQLite 3.15.2 or newer.
+requires the third-party `SQLite <https://sqlite.org/>`_ library.
 
 .. include:: ../includes/optional-module.rst
 

Doc/library/zipfile.rst

@@ -27,7 +27,7 @@ implemented in native Python rather than C.
    The following paragraph should be similar to ../includes/optional-module.rst
 
 Handling compressed archives requires :term:`optional modules <optional module>`
-such as :mod:`zlib`, :mod:`bz2`, :mod:`lzma`, :mod:`~compression.zstd`.
+such as :mod:`zlib`, :mod:`bz2`, :mod:`lzma`, and :mod:`compression.zstd`.
 If any of them are missing from your copy of CPython,
 look for documentation from your distributor (that is,
 whoever provided Python to you).

Doc/library/zlib.rst

@@ -8,7 +8,7 @@
 --------------
 
 For applications that require data compression, the functions in this module
-allow compression and decompression, using the zlib library.
+allow compression and decompression, using the `zlib library <https://www.zlib.net>`_.
 
 .. include:: ../includes/optional-module.rst