floatscan-experiment.c: simplify the note

c-programming/experiments/floatscan-experiment.c

@@ -2,12 +2,11 @@
  * This was an experiment to learn about how libc turn floating point strings
  * into actual values.
  *
- * Expects the floating point string to be in stdin.
+ * The original code is from musl libc: version 1.2.4, src/internal/floatscan.c
  *
- * The new added code:
+ * The added code:
  *     Author: Intel A80486DX2-66
  *     License: Creative Commons Zero 1.0 Universal
- * The original code is from musl libc: version 1.2.4, src/internal/floatscan.c
  */
 
 #include <stdint.h>