master de70147 4/5: Remove some unnecessary references to Emacs 18

[Stefan Kangas]

branch: master
commit de701470b2c62ab47723f8b10cec0ee7f7ed724d
Author: Stefan Kangas <stefan@marxist.se>
Commit: Stefan Kangas <stefan@marxist.se>

    Remove some unnecessary references to Emacs 18
    
    * lisp/progmodes/cmacexp.el:
    * lisp/progmodes/f90.el:
    * lisp/shell.el: Doc fix; don't mention Emacs 18.
---
 lisp/progmodes/cmacexp.el | 9 ---------
 lisp/progmodes/f90.el     | 5 ++---
 lisp/shell.el             | 7 ++-----
 3 files changed, 4 insertions(+), 17 deletions(-)

diff --git a/lisp/progmodes/cmacexp.el b/lisp/progmodes/cmacexp.el
index d3a33bd..1a45b1c 100644
--- a/lisp/progmodes/cmacexp.el
+++ b/lisp/progmodes/cmacexp.el
@@ -72,15 +72,6 @@
 ;; Please report bugs, suggestions, complaints and so on to
 ;; bug-gnu-emacs@gnu.org and pot@gnu.org (Francesco Potortì).
 
-;; IMPROVEMENTS OVER emacs 18.xx cmacexp.el ==========================
-
-;; - A lot of user and programmer visible changes.  See above.
-;; - #line directives are inserted, so __LINE__ and __FILE__ are
-;;   correctly expanded.  Works even with START inside a string, a
-;;   comment or a region #ifdef'd away by cpp. cpp is invoked with -C,
-;;   making comments visible in the expansion.
-;; - All work is done in core memory, no need for temporary files.
-
 ;; ACKNOWLEDGMENTS ===================================================
 
 ;; A lot of thanks to Don Maszle who did a great work of testing, bug
diff --git a/lisp/progmodes/f90.el b/lisp/progmodes/f90.el
index 90678c8..5c0b788 100644
--- a/lisp/progmodes/f90.el
+++ b/lisp/progmodes/f90.el
@@ -117,11 +117,10 @@
 ;;    correctly, but I imagine them to be rare.
 ;; 3) Regexps for hilit19 are no longer supported.
 ;; 4) For FIXED FORMAT code, use fortran mode.
-;; 5) This mode does not work under emacs-18.x.
-;; 6) Preprocessor directives, i.e., lines starting with # are left-justified
+;; 5) Preprocessor directives, i.e., lines starting with # are left-justified
 ;;    and are untouched by all case-changing commands. There is, at present, no
 ;;    mechanism for treating multi-line directives (continued by \ ).
-;; 7) f77 do-loops do 10 i=.. ; ; 10 continue are not correctly indented.
+;; 6) f77 do-loops do 10 i=.. ; ; 10 continue are not correctly indented.
 ;;    You are urged to use f90-do loops (with labels if you wish).
 
 ;; List of user commands
diff --git a/lisp/shell.el b/lisp/shell.el
index 0f86615..3212824 100644
--- a/lisp/shell.el
+++ b/lisp/shell.el
@@ -26,9 +26,7 @@
 ;;; Commentary:
 
 ;; This file defines a shell-in-a-buffer package (shell mode) built on
-;; top of comint mode.  This is actually cmushell with things renamed
-;; to replace its counterpart in Emacs 18.  cmushell is more
-;; featureful, robust, and uniform than the Emacs 18 version.
+;; top of comint mode.
 
 ;; Since this mode is built on top of the general command-interpreter-in-
 ;; a-buffer mode (comint mode), it shares a common base functionality,
@@ -785,8 +783,7 @@ Make the shell buffer the current buffer, and return it.
 ;; that tracks cd, pushd, and popd commands issued to the shell, and
 ;; changes the current directory of the shell buffer accordingly.
 ;;
-;; This is basically a fragile hack, although it's more accurate than
-;; the version in Emacs 18's shell.el. It has the following failings:
+;; This is basically a fragile hack.  It has the following failings:
 ;; 1. It doesn't know about the cdpath shell variable.
 ;; 2. It cannot infallibly deal with command sequences, though it does well
 ;;    with these and with ignoring commands forked in another shell with ()s.