FS#2720 fix a couple of diff issues: shouldn't be any need to html encode before...

... finding diffs; move quantifier outside regex condition

removing hsc() fixes issues like, https://www.dokuwiki.org/plugin:bliki?do=diff&rev2%5B0%5D=1320066769&rev2%5B1%5D=&difftype=sidebyside 
![Screen Shot 2013-02-16 at 21 16 05](https://f.cloud.github.com/assets/176843/164153/270c47be-787e-11e2-8ced-3ac8cd814dd3.png)


moving the quantifier fixes issues like, https://www.dokuwiki.org/plugin:eventline?do=diff&rev2%5B0%5D=1360157545&rev2%5B1%5D=&difftype=sidebyside 
![Screen Shot 2013-02-16 at 21 15 45](https://f.cloud.github.com/assets/176843/164154/2dd43890-787e-11e2-9a85-01663cca95bb.png)