Don't mirror slashes in convert-standard-filename on MS-Windows

* lisp/w32-fns.el (w32-convert-standard-filename): Don't mirror
slashes into backslashes.  This avoids producing ugly file names,
and is deemed no longer necessary, and should certainly be
unrelated to which shell is in use.

2 files changed, 5 insertions, 9 deletions

diff --git a/etc/NEWS b/etc/NEWS
index f964e71f8b6..eff5472e1bd 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -418,6 +418,10 @@ Windows NT and later you can now register any hotkey combination.  (On
 Windows 9X, the previous limitations, spelled out in the Emacs manual,
 still apply.)
 
+** `convert-standard-filename' no longer mirrors slashes on MS-Windows.
+Previously, on MS-Windows this function converted slash characters in
+file names into backslashes.  It no longer does that.
+
 
 * Installation Changes in Emacs 25.1
 
diff --git a/lisp/w32-fns.el b/lisp/w32-fns.el
index 472355741b8..690a9902087 100644
--- a/lisp/w32-fns.el
+++ b/lisp/w32-fns.el
@@ -200,8 +200,7 @@ certain patterns.
 This function is called by `convert-standard-filename'.
 
 Replace invalid characters and turn Cygwin names into native
-names, and also turn slashes into backslashes if the shell
-requires it (see `w32-shell-dos-semantics')."
+names."
   (save-match-data
     (let ((name
 	   (if (string-match "\\`/cygdrive/\\([a-zA-Z]\\)/" filename)
@@ -216,13 +215,6 @@ requires it (see `w32-shell-dos-semantics')."
       (while (string-match "[?*:<>|\"\000-\037]" name start)
 	(aset name (match-beginning 0) ?!)
 	(setq start (match-end 0)))
-      ;; convert directory separators to Windows format
-      ;; (but only if the shell in use requires it)
-      (when (w32-shell-dos-semantics)
-	(setq start 0)
-	(while (string-match "/" name start)
-	  (aset name (match-beginning 0) ?\\)
-	  (setq start (match-end 0))))
       name)))
 
 (defun set-w32-system-coding-system (coding-system)