Filter "Convert URLs into links" doesn't support multilingual web addresses

Thanks for working on this. Is there any reason, why the PREG_CLASS_NUMBERS and PREG_CLASS_CJK was moved from search.module to unicode.inc, but the PREG_CLASS_COMBINED_MARKS was defined in filter.module? If we are changing the location, it is a bit distracting to keep them on separate places.

@@ -1794,5 +1814,34 @@ function _filter_html_escape_tips($filter, $format, $long = FALSE) {
+ * @param (string) $pattern
+ *   Regular expression to match.
+ * @param (string) $callback
+ *   Function to call after the regular expression match.
+ * @param (string) $text
+ *   Text to check.

Let's keep the standard @param string, without brackets.

@@ -1794,5 +1814,34 @@ function _filter_html_escape_tips($filter, $format, $long = FALSE) {
+}
+/**
  * @} End of "Standard filters".
  */

There is a missing newline.

@@ -1558,7 +1578,7 @@ function _filter_url($text, $filter) {
-    // Revert back to the original comment contents
+    // Revert to the original comment contents

If we are updating comments (not sure if this change was needed), please use them correctly and add a full stop.

@@ -83,6 +83,63 @@ define('PREG_CLASS_UNICODE_WORD_BOUNDARY',
+/**
+ * Matches all 'N' Unicode character classes (numbers)
+ */

Full stop is also missing here.

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As these all are a minor changes, I am not opening a separate issue for D7 now, if we can correct this in the next patch iteration. If not, it would be the best to close this and create a separate issue for D7, as per backport policy. Thanks!