rails/rails — pull request #6043 by tonytonyjan (2012-04-29 09:21:24+00:00)
Title: Make non English title indexable (such as Chinese or Japanese) using MD5...

....

For example:
h3. 前情提要 ->

1 前情提要

When there is non English header, it may cause mistake when guide generation.
For example:
h3. This Guide Assumes ->

1 This Guide Assumes

h3. 前情提要 ->

h3(#). 1 前情提要