Using white space in the text of tagnavi files

[iPodVT]

When I was a professional C programmer I put a fair bit of effort into making my source code more easily readable by sometimes using tabs and space chars to make multiple sequential lines of similar code line up vertically.  I did that with my Rockbox tagnavi_custom.config file, and it worked fine for a long time until I recently edited it and all of a sudden things were broken.  I think that it broke because of some (but not all) of the white space I was using to make sequential lines of menu specs code line up.  Is there a declared limit on sequential white space chars in a line of code in a tagnavi_custom.config file?  Thanks.