hanstzou/QLColorCode — comment on commit 0f0f92f9b25dfd7244089a4d97f77b19b40a3794
File:  line 0
By hanstzou:

Lion's HTML preview reads the title tag and use it as the preview window title.
It only shows the file name **when there is no title**.

That's why all windows have the same title “Source file” generated by highlight.
The sed command added here removes the title tag content and thus reveals
the file name.