refactor: review format and imports

src/string.c

@@ -1,4 +1,3 @@
-#include <bsd/string.h>
 #include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
@@ -73,4 +72,4 @@ char *string_replace_at(const char *src, unsigned int from, unsigned int to,
   strlcpy(dst + from + rpl_len, src + to, src_len - to + 1);
 
   return dst;
-}
+}