Fixed doc

Author: yuce

Doc/library/_thread.rst

@@ -120,15 +120,15 @@ This module defines the following constants and functions:
    Its value may be used to uniquely identify this particular thread system-wide
    (until the thread terminates, after which the value may be recycled by the OS).
 
-   .. availability:: Windows, FreeBSD, Linux, macOS, OpenBSD, NetBSD, AIX, DragonFlyBSD, GNU/kFreeBSD, Illumos/Solaris.
+   .. availability:: Windows, FreeBSD, Linux, macOS, OpenBSD, NetBSD, AIX, DragonFlyBSD, GNU/kFreeBSD, Solaris.
 
    .. versionadded:: 3.8
 
    .. versionchanged:: 3.13
       Added support for GNU/kFreeBSD.
 
    .. versionchanged:: 3.15
-      Added support for Illumos/Solaris.
+      Added support for Solaris.
 
 .. function:: stack_size([size])
 

Doc/library/threading.rst

@@ -191,15 +191,15 @@ This module defines the following functions:
    Its value may be used to uniquely identify this particular thread system-wide
    (until the thread terminates, after which the value may be recycled by the OS).
 
-   .. availability:: Windows, FreeBSD, Linux, macOS, OpenBSD, NetBSD, AIX, DragonFlyBSD, GNU/kFreeBSD, Illumos/Solaris.
+   .. availability:: Windows, FreeBSD, Linux, macOS, OpenBSD, NetBSD, AIX, DragonFlyBSD, GNU/kFreeBSD, Solaris.
 
    .. versionadded:: 3.8
 
    .. versionchanged:: 3.13
       Added support for GNU/kFreeBSD.
 
    .. versionchanged:: 3.15
-      Added support for Illumos/Solaris.
+      Added support for Solaris.
 
 
 .. function:: enumerate()