pythongh-101100: Fix sphinx warnings in library/getpass.rst (python#110461)

Author: sobolevn

Doc/library/getpass.rst

@@ -43,7 +43,7 @@ The :mod:`getpass` module provides two functions:
    Return the "login name" of the user.
 
    This function checks the environment variables :envvar:`LOGNAME`,
-   :envvar:`USER`, :envvar:`LNAME` and :envvar:`USERNAME`, in order, and
+   :envvar:`USER`, :envvar:`!LNAME` and :envvar:`USERNAME`, in order, and
    returns the value of the first one which is set to a non-empty string.  If
    none are set, the login name from the password database is returned on
    systems which support the :mod:`pwd` module, otherwise, an exception is

Doc/tools/.nitignore

@@ -66,7 +66,6 @@ Doc/library/fcntl.rst
 Doc/library/ftplib.rst
 Doc/library/functions.rst
 Doc/library/functools.rst
-Doc/library/getpass.rst
 Doc/library/gettext.rst
 Doc/library/gzip.rst
 Doc/library/http.client.rst