Coding issue

I am trying to edit the tabber.php of a theme. When I go to theme editor inder tabber.php I am getting the following

vti_encoding:SR|utf8-nl
vti_author:SR|myhunti1
vti_modifiedby:SR|myhunti1
vti_timelastmodified:TR|06 Jul 2008 00:57:14 -0000
vti_timecreated:TR|06 Jul 2008 00:57:14 -0000
vti_cacheddtm:TX|06 Jul 2008 00:57:14 -0000
vti_filesize:IR|6793
vti_extenderversion:SR|5.0.2.4803
vti_backlinkinfo:VX|

The original code is not visible. Can anyone help with this?

Thanks
jeff