Fix URL linkifier grabbing full-width spaces and quotations (#9997)

Fix #9993
Fix #5654

app/lib/formatter.rb

@@ -199,12 +199,22 @@ class Formatter
     result.flatten.join
   end
 
+  UNICODE_ESCAPE_BLACKLIST_RE = /\p{Z}|\p{P}/
+
   def utf8_friendly_extractor(text, options = {})
     old_to_new_index = [0]
 
     escaped = text.chars.map do |c|
-      output = c.ord.to_s(16).length > 2 ? CGI.escape(c) : c
+      output = begin
+        if c.ord.to_s(16).length > 2 && UNICODE_ESCAPE_BLACKLIST_RE.match(c).nil?
+          CGI.escape(c)
+        else
+          c
+        end
+      end
+
       old_to_new_index << old_to_new_index.last + output.length
+
       output
     end.join