Manual pages: use a showcase time-stamp-pattern

* doc/man/ebrowse.1:
* doc/man/emacs.1.in:
* doc/man/emacsclient.1:
* doc/man/etags.1:  Loosen the time-stamp-pattern used so that
it is not specific to each file.  These files now provide
readable examples that will work with most man pages.

doc/man/ebrowse.1

@@ -101,6 +101,6 @@ in a translation approved by the Free Software Foundation.
 
 .\" Local Variables:
 .\" eval: (add-hook 'before-save-hook 'time-stamp nil t)
-.\" time-stamp-pattern: "3/.TH EBROWSE 1 \"%Y-%02m-%02d\" \"GNU Emacs\" \"GNU\"$"
+.\" time-stamp-pattern: "^\\.TH [^ ]+ [^ ]+ \"?%Y-%m-%d\\_>"
 .\" time-stamp-time-zone: "UTC0"
 .\" End:

doc/man/emacs.1.in

@@ -685,6 +685,6 @@ There is NO WARRANTY, to the extent permitted by law.
 
 .\" Local Variables:
 .\" eval: (add-hook 'before-save-hook 'time-stamp nil t)
-.\" time-stamp-pattern: "3/.TH EMACS 1 \"%Y-%02m-%02d\" \"GNU Emacs @version@\" \"GNU\"$"
+.\" time-stamp-pattern: "^\\.TH [^ ]+ [^ ]+ \"?%Y-%m-%d\\_>"
 .\" time-stamp-time-zone: "UTC0"
 .\" End:

doc/man/emacsclient.1

@@ -194,6 +194,6 @@ This manual page is in the public domain.
 
 .\" Local Variables:
 .\" eval: (add-hook 'before-save-hook 'time-stamp nil t)
-.\" time-stamp-pattern: "3/.TH EMACSCLIENT 1 \"%Y-%02m-%02d\" \"GNU Emacs\" \"GNU\"$"
+.\" time-stamp-pattern: "^\\.TH [^ ]+ [^ ]+ \"?%Y-%m-%d\\_>"
 .\" time-stamp-time-zone: "UTC0"
 .\" End:

doc/man/etags.1

@@ -329,6 +329,6 @@ in a translation approved by the Free Software Foundation.
 
 .\" Local Variables:
 .\" eval: (add-hook 'before-save-hook 'time-stamp nil t)
-.\" time-stamp-pattern: "3/.TH ETAGS 1 \"%Y-%02m-%02d\" \"GNU Tools\" \"GNU\"$"
+.\" time-stamp-pattern: "^\\.TH [^ ]+ [^ ]+ \"?%Y-%m-%d\\_>"
 .\" time-stamp-time-zone: "UTC0"
 .\" End: