run git diff --check on your changes before you commit.
-(1a) Try to be nice to older C compilers
-We try to support a wide range of C compilers to compile
-git with. That means that you should not use C99 initializers, even
-if a lot of compilers grok it.
-Also, variables have to be declared at the beginning of the block
-(you can check this with gcc, using the -Wdeclaration-after-statement
-Another thing: NULL pointers shall be written as NULL, not as 0.
(2) Generate your patch using git tools out of your commits.
git based diff tools generate unidiff which is the preferred format.