Make some versions in docs match package version

* doc/emacs/misc.texi (Interactive Shell): Bump Emacs version.
* doc/misc/ediff.texi:
* doc/misc/flymake.texi:
* doc/misc/viper.texi: Fix version to match package.
* lisp/emulation/viper.el: Make version match variable.

doc/emacs/misc.texi

@@ -914,7 +914,7 @@ Coding}.
 @cindex @env{INSIDE_EMACS} environment variable
   Emacs sets the environment variable @env{INSIDE_EMACS} in the
 subshell to @samp{@var{version},comint}, where @var{version} is the
-Emacs version (e.g., @samp{24.1}).  Programs can check this variable
+Emacs version (e.g., @samp{28.1}).  Programs can check this variable
 to determine whether they are running inside an Emacs subshell.
 
 @node Shell Mode

doc/misc/ediff.texi

@@ -50,7 +50,7 @@ modify this GNU manual.''
 @titlepage
 @title Ediff User's Manual
 @sp 4
-@subtitle Ediff version 2.81.2
+@subtitle Ediff version 2.81.6
 @sp 1
 @subtitle November 2008
 @sp 5

doc/misc/flymake.texi

@@ -1,8 +1,8 @@
 \input texinfo   @c -*-texinfo; coding: utf-8 -*-
 @comment %**start of header
 @setfilename ../../info/flymake.info
-@set VERSION 1.2
-@set UPDATED September 2021
+@set VERSION 1.2.2
+@set UPDATED November 2021
 @settitle GNU Flymake @value{VERSION}
 @include docstyle.texi
 @syncodeindex pg cp

doc/misc/viper.texi

@@ -34,7 +34,7 @@ modify this GNU manual.''
 @titlepage
 @title Viper Is a Package for Emacs Rebels
 @subtitle a Vi emulator for Emacs
-@subtitle November 2008, Viper Version 3.11.2
+@subtitle July 2013, Viper Version 3.14.2
 
 @author Michael Kifer (Viper)
 @author Aamod Sane (VIP 4.4)

lisp/emulation/viper.el

@@ -7,7 +7,7 @@
 
 ;; Author: Michael Kifer <kifer@cs.stonybrook.edu>
 ;; Keywords: emulations
-;; Version: 3.14.1
+;; Version: 3.14.2
 
 ;; Yoni Rabkin <yoni@rabkins.net> contacted the maintainer of this
 ;; file on 20/3/2008, and the maintainer agreed that when a bug is