git: use logical-not operator to toggle between 0 and 1

If it is known that an int is either 1 or 0,
using a logical-not to switch instead of a
modulus makes more sense and is more efficient.

Signed-off-by: Seija Kijin <[email protected]>

Author: Seija Kijin

diff.c

@@ -1231,7 +1231,7 @@ static void mark_color_as_moved(struct diff_options *o,
 							    &pmb_nr);
 
 			if (contiguous && pmb_nr && moved_symbol == l->s)
-				flipped_block = (flipped_block + 1) % 2;
+				flipped_block = !flipped_block;
 			else
 				flipped_block = 0;