ignore whitespace in svn diff

svn diff -x -w

the -x indicates that the next option is an argument for the svn internal diff implementation

other options:

-u (--unified):
   Output 3 lines of unified context.
-b (--ignore-space-change):
   Ignore changes in the amount of white space.
-w (--ignore-all-space):
   Ignore all white space.
--ignore-eol-style:
   Ignore changes in EOL style.
-p (--show-c-function):
   Show C function name in diff output.