More doc fixes for bug#19502 -- make documentation less X-specific.

 doc/lispref/frames.texi (Display Feature Testing): Make the description of
 x-server-version and x-server-vendor less X-specific.

 Make doc strings on X and w32 identical.
 src/w32fns.c (Fx_server_version, Fx_server_vendor): Doc fix.
 src/xfns.c (Fx_server_version, Fx_server_vendor): Doc fix.

3 files changed, 44 insertions, 16 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 39acf77e41b..d9dd53ba1df 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,9 @@
 2015-01-04  Eli Zaretskii  <eliz@gnu.org>
 
+        * w32fns.c (Fx_server_version, Fx_server_vendor): Doc fix.
+
+        * xfns.c (Fx_server_version, Fx_server_vendor): Doc fix.
+
         * emacs.c (syms_of_emacs) <system-configuration>: Doc fix.
         (Bug#19502)
 
diff --git a/src/w32fns.c b/src/w32fns.c
index 64e0e6d028a..412e91e045e 100644
--- a/src/w32fns.c
+++ b/src/w32fns.c
@@ -4842,25 +4842,38 @@ If omitted or nil, that stands for the selected frame's display.  */)
 }
 
 DEFUN ("x-server-vendor", Fx_server_vendor, Sx_server_vendor, 0, 1, 0,
-       doc: /* Return the "vendor ID" string of the W32 system (Microsoft).
-The optional argument DISPLAY specifies which display to ask about.
-DISPLAY should be either a frame or a display name (a string).
+       doc: /* Return the "vendor ID" string of the GUI software on TERMINAL.
+
+\(Labeling every distributor as a "vendor" embodies the false assumption
+that operating systems cannot be developed and distributed noncommercially.)
+
+For GNU and Unix systems, this queries the X server software; for
+MS-Windows, this queries the OS.
+
+The optional argument TERMINAL specifies which display to ask about.
+TERMINAL should be a terminal object, a frame or a display name (a string).
 If omitted or nil, that stands for the selected frame's display.  */)
-  (Lisp_Object display)
+  (Lisp_Object terminal)
 {
   return build_string ("Microsoft Corp.");
 }
 
 DEFUN ("x-server-version", Fx_server_version, Sx_server_version, 0, 1, 0,
-       doc: /* Return the version numbers of the server of DISPLAY.
-The value is a list of three integers: the major and minor
-version numbers of the X Protocol in use, and the distributor-specific
-release number.  See also the function `x-server-vendor'.
+       doc: /* Return the version numbers of the GUI software on TERMINAL.
+The value is a list of three integers specifying the version of the GUI
+software in use.
 
-The optional argument DISPLAY specifies which display to ask about.
-DISPLAY should be either a frame or a display name (a string).
+For GNU and Unix system, the first 2 numbers are the version of the X
+Protocol used on TERMINAL and the 3rd number is the distributor-specific
+release number.  For MS-Windows, the 3 numbers report the version and
+the build number of the OS.
+
+See also the function `x-server-vendor'.
+
+The optional argument TERMINAL specifies which display to ask about.
+TERMINAL should be a terminal object, a frame or a display name (a string).
 If omitted or nil, that stands for the selected frame's display.  */)
-  (Lisp_Object display)
+  (Lisp_Object terminal)
 {
   return list3i (w32_major_version, w32_minor_version, w32_build_number);
 }
diff --git a/src/xfns.c b/src/xfns.c
index a9192c8431d..b21228a8697 100644
--- a/src/xfns.c
+++ b/src/xfns.c
@@ -3535,10 +3535,15 @@ If omitted or nil, that stands for the selected frame's display.  */)
 }
 
 DEFUN ("x-server-vendor", Fx_server_vendor, Sx_server_vendor, 0, 1, 0,
-       doc: /* Return the "vendor ID" string of the X server of display TERMINAL.
+       doc: /* Return the "vendor ID" string of the GUI software on TERMINAL.
+
 \(Labeling every distributor as a "vendor" embodies the false assumption
 that operating systems cannot be developed and distributed noncommercially.)
 The optional argument TERMINAL specifies which display to ask about.
+
+For GNU and Unix systems, this queries the X server software; for
+MS-Windows, this queries the OS.
+
 TERMINAL should be a terminal object, a frame or a display name (a string).
 If omitted or nil, that stands for the selected frame's display.  */)
   (Lisp_Object terminal)
@@ -3551,10 +3556,16 @@ If omitted or nil, that stands for the selected frame's display.  */)
 }
 
 DEFUN ("x-server-version", Fx_server_version, Sx_server_version, 0, 1, 0,
-       doc: /* Return the version numbers of the X server of display TERMINAL.
-The value is a list of three integers: the major and minor
-version numbers of the X Protocol in use, and the distributor-specific release
-number.  See also the function `x-server-vendor'.
+       doc: /* Return the version numbers of the GUI software on TERMINAL.
+The value is a list of three integers specifying the version of the GUI
+software in use.
+
+For GNU and Unix system, the first 2 numbers are the version of the X
+Protocol used on TERMINAL and the 3rd number is the distributor-specific
+release number.  For MS-Windows, the 3 numbers report the version and
+the build number of the OS.
+
+See also the function `x-server-vendor'.
 
 The optional argument TERMINAL specifies which display to ask about.
 TERMINAL should be a terminal object, a frame or a display name (a string).