I have an SVN file which is now missing some logic and so I need to go back about 40 revisions to the time when it had the logic I need. Other than trying to view a diff of the file in the command line (very hard to read), is there any way I could get a copy of that file to review so I can study it to recover parts?
You can update to an older revision:
svn update -r 666 file
Or you can just view the file directly:
svn cat -r 666 file | less