Make Emacs settings match perltidy configuration

Set Emacs's perl-continued-statement-offset to match perltidy's
--continuation-indentation, which is 2 (not overridden in PostgreSQL's
profile) rather than the 4 that Emacs uses by default.

.dir-locals.el

@@ -8,7 +8,7 @@
  (dsssl-mode . ((indent-tabs-mode . nil)))
  (nxml-mode . ((indent-tabs-mode . nil)))
  (perl-mode . ((perl-indent-level . 4)
-               (perl-continued-statement-offset . 4)
+               (perl-continued-statement-offset . 2)
                (perl-continued-brace-offset . 4)
                (perl-brace-offset . 0)
                (perl-brace-imaginary-offset . 0)

src/tools/editors/emacs.samples

@@ -48,7 +48,7 @@
   (setq perl-brace-imaginary-offset 0)
   (setq perl-brace-offset 0)
   (setq perl-continued-brace-offset 4)
-  (setq perl-continued-statement-offset 4)
+  (setq perl-continued-statement-offset 2)
   (setq perl-indent-level 4)
   (setq perl-label-offset -2)
   (setq indent-tabs-mode t)