; perl-mode.el: Allow newline between quote-likes and delimiter

* lisp/progmodes/perl-mode.el (perl-syntax-propertize-function):
Allow newline between a quote-like operator and its delimiter
(Bug#22355).

* test/lisp/progmodes/cperl-mode-tests.el (cperl-test-bug-22355):
Test case for the fix.

* test/lisp/progmodes/cperl-mode-resources/cperl-bug-22355.pl:
Test resource for a quote-like with newline before the delimiter.

lisp/progmodes/perl-mode.el

@@ -285,7 +285,7 @@
              (put-text-property (match-beginning 2) (match-end 2)
                                 'syntax-table (string-to-syntax "\""))
              (perl-syntax-propertize-special-constructs end)))))
-      ("\\(^\\|[?:.,;=|&!~({[ \t]\\|=>\\)\\([msy]\\|q[qxrw]?\\|tr\\)\\>\\s-*\\(?:\\([^])}>= \n\t]\\)\\|\\(?3:=\\)[^>]\\)"
+      ("\\(^\\|[?:.,;=|&!~({[ \t]\\|=>\\)\\([msy]\\|q[qxrw]?\\|tr\\)\\>\\(?:\\s-\\|\n\\)*\\(?:\\([^])}>= \n\t]\\)\\|\\(?3:=\\)[^>]\\)"
        ;; Nasty cases:
        ;; /foo/m  $a->m  $#m $m @m %m
        ;; \s (appears often in regexps).

test/lisp/progmodes/cperl-mode-resources/cperl-bug-22355.pl

@@ -0,0 +1,14 @@
+# The source file contains non-ASCII characters, supposed to be saved
+# in UTF-8 encoding.  Tell Perl about that, just in case.
+use utf8;
+
+# Following code is the example from the report Bug#22355 which needed
+# attention in perl-mode.
+
+printf qq
+{<?xml version="1.0" encoding="UTF-8"?>
+<kml xmlns="http://www.opengis.net/kml/2.2">
+ <Document>
+  <Folder><name>台灣 %s 廣播電台</name>
+  <description><![CDATA[http://radioscanningtw.wikia.com/wiki/台描:地圖 %d-%02d-%02d]]></description>
+}, uc( substr( $ARGV[0], 0, 2 ) ), $year + 1900, $mon + 1, $mday;

test/lisp/progmodes/cperl-mode-tests.el

@@ -377,6 +377,17 @@ documentation it does the right thing anyway."
      (cperl-indent-command)
      (forward-line 1))))
 
+(ert-deftest cperl-test-bug-22355 ()
+  "Verify that substitutions are fontified directly after \"|&\".
+Regular expressions are strings in both perl-mode and cperl-mode."
+  (with-temp-buffer
+    (insert-file-contents (ert-resource-file "cperl-bug-22355.pl"))
+    (funcall cperl-test-mode)
+    (goto-char (point-min))
+    ;; Just check for the start of the string
+    (search-forward "{")
+    (should (nth 3 (syntax-ppss)))))
+
 (ert-deftest cperl-test-bug-23992 ()
   "Verify that substitutions are fontified directly after \"|&\".
 Regular expressions are strings in both perl-mode and cperl-mode."