#14804: Remove [] around optional arguments with default values

diff --cc Doc/library/curses.rst
Simple merge

diff --cc Doc/library/email.generator.rst
Simple merge

diff --cc Doc/library/http.cookiejar.rst
Simple merge

diff --cc Doc/library/os.rst
Simple merge

diff --cc Doc/library/ossaudiodev.rst
Simple merge

diff --cc Doc/library/select.rst
Simple merge

diff --cc Doc/library/sqlite3.rst
Simple merge