Better Lisp_String comments

* src/lisp.h (struct Lisp_String): Comments improved.
* src/pdumper.c (dump_string): Update hash (comment change only).

1 files changed, 9 insertions, 4 deletions

diff --git a/src/lisp.h b/src/lisp.h
index 9710dbef8d2..56f24d82810 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -1575,10 +1575,15 @@ struct Lisp_String
   {
     struct
     {
-      ptrdiff_t size;           /* MSB is used as the markbit.  */
-      ptrdiff_t size_byte;      /* Set to -1 for unibyte strings,
-                                   -2 for data in rodata,
-                                   -3 for immovable unibyte strings.  */
+      /* Number of characters in string; MSB is used as the mark bit.  */
+      ptrdiff_t size;
+      /* If nonnegative, number of bytes in the string (which is multibyte).
+         If negative, the string is unibyte:
+         -1 for data normally allocated
+         -2 for data in rodata (C string constants)
+         -3 for data that must be immovable (used for bytecode)  */
+      ptrdiff_t size_byte;
+
       INTERVAL intervals;       /* Text properties in this string.  */
       unsigned char *data;
     } s;