When editing LaTeX, it is common practice not to check in the binary files or temporary files such as .pdf, .aux, .log, etc. Here is the way to set it: in the directory, type
svn pe svn:ignore .
The default editor will show up. Type in the patterns of files you want to ignore and save. A typical setting of LaTeX project folders is as follows.
*.aux *.out *.log *.toc *.bbl *.blg *.rel *.synctex.gz *.dvi *.ps *.pdf *.bak *.fmt *.snm *.nav *~ auto