Fwd: diff not finding difference

This is a weird one:

[file-1 begin]

abcd efg hijklmnop

[file-1 end]

[file-2 begin]

blah blah blah ///////////////////////////////////////////////////////////////////////////////// abdc boo ya!

[file-2 end]

Do a diff between these and it won't find any difference.

Same with the following two lines, each in a different file: sabc fed ghi jkl abc def ghi jkl

I first noticed this on the command line git and then in VS2013. The original problem was like my first example. The files were much longer, but all that git would see is the addition of the line of ////..., but not the removal of the original line.

I've tried some other simple file changes with similar results. Something seems to be definitely broken in git diff. :(

Command line version of git is 1.9.5 msysgit.0.

A