[css-flexbox] Try to force past the 500.

Author: tabatkins

css-flexbox/Overview.bs

@@ -26,7 +26,7 @@ Former Editor: Ian Hickson, formerly of Opera Software, ian@hixie.ch
 Former Editor: David Hyatt, formerly of Netscape Corporation, hyatt@apple.com
 !Issues List: http://dev.w3.org/csswg/css-flexbox-1/issues-cr-2012
 Ignored Terms: column-*, auto
-Link Defaults: css21 (property) margin/min-width/min-height/max-width/max-height, css-break-3 (property) break-after
+Link Defaults:  css21 (property) margin/min-width/min-height/max-width/max-height, css-break-3 (property) break-after
 </pre>
 <style>
 code.one-line { white-space: pre; }