Allow unicode quotes as markdown entry separators.

Fixes #3867.

Telegram/SourceFiles/ui/text/text_entity.cpp

@@ -28,12 +28,12 @@ namespace {
 
 QString ExpressionDomain() {
 	// Matches any domain name, containing at least one '.', including "file.txt".
-	return QString::fromUtf8("(?<![\\w\\$\\-\\_%=\\.])(?:([a-zA-Z]+)://)?((?:[A-Za-z" "\xd0\x90-\xd0\xaf\xd0\x81" "\xd0\xb0-\xd1\x8f\xd1\x91" "0-9\\-\\_]+\\.){1,10}([A-Za-z" "\xd1\x80\xd1\x84" "\\-\\d]{2,22})(\\:\\d+)?)");
+	return QString::fromUtf8("(?<![\\w\\$\\-\\_%=\\.])(?:([a-zA-Z]+)://)?((?:[A-Za-z" "\xD0\x90-\xD0\xAF\xD0\x81" "\xD0\xB0-\xD1\x8F\xD1\x91" "0-9\\-\\_]+\\.){1,10}([A-Za-z" "\xD1\x80\xD1\x84" "\\-\\d]{2,22})(\\:\\d+)?)");
 }
 
 QString ExpressionDomainExplicit() {
 	// Matches any domain name, containing a protocol, including "test://localhost".
-	return QString::fromUtf8("(?<![\\w\\$\\-\\_%=\\.])(?:([a-zA-Z]+)://)((?:[A-Za-z" "\xd0\x90-\xd0\xaf\xd0\x81" "\xd0\xb0-\xd1\x8f\xd1\x91" "0-9\\-\\_]+\\.){0,10}([A-Za-z" "\xd1\x80\xd1\x84" "\\-\\d]{2,22})(\\:\\d+)?)");
+	return QString::fromUtf8("(?<![\\w\\$\\-\\_%=\\.])(?:([a-zA-Z]+)://)((?:[A-Za-z" "\xD0\x90-\xD0\xAF\xD0\x81" "\xD0\xB0-\xD1\x8F\xD1\x91" "0-9\\-\\_]+\\.){0,10}([A-Za-z" "\xD1\x80\xD1\x84" "\\-\\d]{2,22})(\\:\\d+)?)");
 }
 
 QString ExpressionMailNameAtEnd() {
@@ -44,7 +44,9 @@ QString ExpressionMailNameAtEnd() {
 }
 
 QString ExpressionSeparators(const QString &additional) {
-	return qsl("\\s\\.,:;<>|'\"\\[\\]\\{\\}\\~\\!\\?\\%\\^\\(\\)\\-\\+=\\x10") + additional;
+	// UTF8 quotes
+	const auto quotes = QString::fromUtf8("\xC2\xAB\xC2\xBB\xE2\x80\x9C\xE2\x80\x9D\xE2\x80\x98\xE2\x80\x99");
+	return qsl("\\s\\.,:;<>|'\"\\[\\]\\{\\}\\~\\!\\?\\%\\^\\(\\)\\-\\+=\\x10") + quotes + additional;
 }
 
 QString ExpressionHashtag() {