Merge branch 'ticket/153' into develop

src/main/java/com/gitblit/tickets/TicketIndexer.java

@@ -143,8 +143,10 @@ public class TicketIndexer {
 
 		private String escape(String value) {
 			if (value.charAt(0) != '"') {
-				if (value.indexOf('/') > -1 || value.indexOf('-') > -1) {
-					return "\"" + value + "\"";
+				for (char c : value.toCharArray()) {
+					if (!Character.isLetterOrDigit(c)) {
+						return "\"" + value + "\"";
+					}
 				}
 			}
 			return value;