Fix misuses of NULL when talking about the NUL character

* lisp/subr.el (inhibit-null-byte-detection): Make it an obsolete alias.

* src/coding.c (setup_coding_system): Use new name.
(detect_coding): Rename null_byte_found => nul_byte_found.
(detect_coding_system): Use new name.
Rename null_byte_found => nul_byte_found.
(Fdefine_coding_system_internal): Use new name.
(syms_of_coding): Rename inhibit-null-byte-detection to
inhibit-nul-byte-detection.
* src/w16select.c (get_clipboard_data): null_char => nul_char.
* src/json.c (check_string_without_embedded_nuls): Rename from
check_string_without_embedded_nulls.
(Fjson_parse_string): Adjust accordingly.
* src/coding.h (enum define_coding_undecided_arg_index)
(enum coding_attr_index): ...null_byte... => ...nul_byte....
* lisp/info.el (info-insert-file-contents, Info-insert-dir):
* lisp/international/mule.el (define-coding-system):
* lisp/vc/vc-git.el (vc-git--call):
* doc/lispref/nonascii.texi (Lisp and Coding Systems): Use the new name.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/bignum.c b/src/bignum.c
index 14c4cdb82ac..4118601e108 100644
--- a/src/bignum.c
+++ b/src/bignum.c
@@ -271,7 +271,7 @@ bignum_to_uintmax (Lisp_Object x)
 
 /* Yield an upper bound on the buffer size needed to contain a C
    string representing the NUM in base BASE.  This includes any
-   preceding '-' and the terminating null.  */
+   preceding '-' and the terminating NUL.  */
 static ptrdiff_t
 mpz_bufsize (mpz_t const num, int base)
 {
@@ -336,7 +336,7 @@ bignum_to_string (Lisp_Object num, int base)
 
 /* Create a bignum by scanning NUM, with digits in BASE.
    NUM must consist of an optional '-', a nonempty sequence
-   of base-BASE digits, and a terminating null byte, and
+   of base-BASE digits, and a terminating NUL byte, and
    the represented number must not be in fixnum range.  */
 
 Lisp_Object