improve git diff

Sometimes git does not print the name of the function being changed
after @@. It happens especially after a goto label which is not indented.
Giving a hint about the languages of files .c, .h and .py
will improve hunk headers of "git diff" rendering.

Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>

diff --git a/.gitattributes b/.gitattributes
new file mode 100644 (file)
index 0000000..fe555f8
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,3 @@
+*.c   diff=cpp
+*.h   diff=cpp
+*.py  diff=python