Disallow "{", "}" and "#" in Project monograms

Summary: Currently, mentioning two projects in a block (`{#a} {#b}`) produces an overzealous parse. Forbid these characters in project monograms.

Test Plan: Got correct markup.

Reviewers: btrahan, dctrwatson, chad

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D8141

src/applications/project/phid/PhabricatorProjectPHIDTypeProject.php

@@ -45,7 +45,7 @@ final class PhabricatorProjectPHIDTypeProject extends PhabricatorPHIDType {
     // NOTE: This explicitly does not match strings which contain only
     // digits, because digit strings like "#123" are used to reference tasks at
     // Facebook and are somewhat conventional in general.
-    return '[^\s.!,:;]*[^\s\d.!,:;]+[^\s.!,:;]*';
+    return '[^\s.!,:;{}#]*[^\s\d.!,:;{}#]+[^\s.!,:;{}#]*';
   }
 
   public function canLoadNamedObject($name) {