[3.13] gh-101100: Fix sphinx warnings in `library/asyncio-subprocess.rst` (GH-130994) (#131074)

(cherry picked from commit 7cc99a54b7)

Doc/library/asyncio-subprocess.rst

@@ -68,7 +68,7 @@ Creating Subprocesses
    Create a subprocess.
 
    The *limit* argument sets the buffer limit for :class:`StreamReader`
-   wrappers for :attr:`Process.stdout` and :attr:`Process.stderr`
+   wrappers for :attr:`~asyncio.subprocess.Process.stdout` and :attr:`~asyncio.subprocess.Process.stderr`
    (if :const:`subprocess.PIPE` is passed to *stdout* and *stderr* arguments).
 
    Return a :class:`~asyncio.subprocess.Process` instance.
@@ -87,7 +87,7 @@ Creating Subprocesses
    Run the *cmd* shell command.
 
    The *limit* argument sets the buffer limit for :class:`StreamReader`
-   wrappers for :attr:`Process.stdout` and :attr:`Process.stderr`
+   wrappers for :attr:`~asyncio.subprocess.Process.stdout` and :attr:`~asyncio.subprocess.Process.stderr`
    (if :const:`subprocess.PIPE` is passed to *stdout* and *stderr* arguments).
 
    Return a :class:`~asyncio.subprocess.Process` instance.
@@ -132,12 +132,12 @@ Constants
 
    If *PIPE* is passed to *stdin* argument, the
    :attr:`Process.stdin <asyncio.subprocess.Process.stdin>` attribute
-   will point to a :class:`StreamWriter` instance.
+   will point to a :class:`~asyncio.StreamWriter` instance.
 
    If *PIPE* is passed to *stdout* or *stderr* arguments, the
    :attr:`Process.stdout <asyncio.subprocess.Process.stdout>` and
    :attr:`Process.stderr <asyncio.subprocess.Process.stderr>`
-   attributes will point to :class:`StreamReader` instances.
+   attributes will point to :class:`~asyncio.StreamReader` instances.
 
 .. data:: asyncio.subprocess.STDOUT
    :module:
@@ -165,7 +165,7 @@ their completion.
    :module:
 
    An object that wraps OS processes created by the
-   :func:`create_subprocess_exec` and :func:`create_subprocess_shell`
+   :func:`~asyncio.create_subprocess_exec` and :func:`~asyncio.create_subprocess_shell`
    functions.
 
    This class is designed to have a similar API to the
@@ -263,24 +263,24 @@ their completion.
 
       Kill the child process.
 
-      On POSIX systems this method sends :py:data:`SIGKILL` to the child
+      On POSIX systems this method sends :py:data:`~signal.SIGKILL` to the child
       process.
 
       On Windows this method is an alias for :meth:`terminate`.
 
    .. attribute:: stdin
 
-      Standard input stream (:class:`StreamWriter`) or ``None``
+      Standard input stream (:class:`~asyncio.StreamWriter`) or ``None``
       if the process was created with ``stdin=None``.
 
    .. attribute:: stdout
 
-      Standard output stream (:class:`StreamReader`) or ``None``
+      Standard output stream (:class:`~asyncio.StreamReader`) or ``None``
       if the process was created with ``stdout=None``.
 
    .. attribute:: stderr
 
-      Standard error stream (:class:`StreamReader`) or ``None``
+      Standard error stream (:class:`~asyncio.StreamReader`) or ``None``
       if the process was created with ``stderr=None``.
 
    .. warning::
@@ -296,7 +296,7 @@ their completion.
 
       Process identification number (PID).
 
-      Note that for processes created by the :func:`create_subprocess_shell`
+      Note that for processes created by the :func:`~asyncio.create_subprocess_shell`
       function, this attribute is the PID of the spawned shell.
 
    .. attribute:: returncode

Doc/tools/.nitignore

@@ -15,7 +15,6 @@ Doc/extending/extending.rst
 Doc/library/ast.rst
 Doc/library/asyncio-extending.rst
 Doc/library/asyncio-policy.rst
-Doc/library/asyncio-subprocess.rst
 Doc/library/decimal.rst
 Doc/library/email.charset.rst
 Doc/library/email.compat32-message.rst