diff: add option to report whether files are binary
When generating diff output, if either side of a filepair is detected as binary, Git omits the diff content and instead prints a "Binary files differ" message.
In some cases, it can be useful to know which files were detected as
binary and which were treated as text. Introduce a new
--report-binary-files diff option that, when enabled, appends a line
for each file indicating whether Git considered it binary or text.
Signed-off-by: Justin Tobler jltobler@gmail.com
Related: #566
Edited by Justin Tobler