Git diff command showing entire file is modified instead of showing modified small part of code

Question

I am using git repository. Everything is working properly except git diff command. Whenever I modify any file then git diff command showing entire file is modified even though I modified small portion of the code.

What could be the reason git diff showing entire file modified instead of small portion of the code? Also let me know setting of git diff configuration.

diff --git a/application/routes.php b/application/routes.php
index 2842f8d..6629d16 100755
--- a/application/routes.php
+++ b/application/routes.php @@ -1,671 +1,676 @@ -<?php -/** - * Set the routes. Each route must have a minimum of a name, a URI and a set of - * defaults for the URI. - / -?> +<?php +/* + * Set the routes. Each route must have a minimum of a name, a URI and a set of + * defaults for the URI. + */ +?>

Answer 1

Compare the output of git diff and git diff -b. Whitespace may be to blame. Reflowing text might be another (you didn't mention what you were storing).

Answer 2

The file is either stored in unix mode or windows mode (with different line endings) and when you save the file you save it in the opposite format.