[devel] Spell "behavior" consistently.
diff --git a/png.c b/png.c
index f85c90e..db3051d 100644
--- a/png.c
+++ b/png.c
@@ -43,7 +43,7 @@
* can simply check the remaining bytes for extra assurance. Returns
* an integer less than, equal to, or greater than zero if sig is found,
* respectively, to be less than, to match, or be greater than the correct
- * PNG signature (this is the same behaviour as strcmp, memcmp, etc).
+ * PNG signature (this is the same behavior as strcmp, memcmp, etc).
*/
int PNGAPI
png_sig_cmp(png_const_bytep sig, png_size_t start, png_size_t num_to_check)