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drive letter, be careful not to create a UNC filename.
(Fadd_name_to_file) [WINDOWSNT]: Remove conditional.

call Fboundp on Vset_auto_coding_function, just check non-nil.

Vauto_file_coding_system.
(syms_of_fileio): Adjusted for the above change.  Doc-string
modified.
(Finsert_file_contents): The argument for Vset_auto_coding is a
concatination of the heading 1K-byte and the tailing 3K-byte.

enable-multibyte-characters is nil.
(Fread_file_name): Call Fcompleting_read with INHERIT-INPUT-METHOD
nil.

(Finsert_file_contents): Decide coding system after opening a
file.  Call functions set in Vauto_file_coding_system_function.
(syms_of_fileio): Declare auto-file-coding-system as a Lisp
variable.

according to eol conversion used on file.

whether another buffer has locked this file.

CODING_MAY_REQUIRE_NO_CONVERSION and
CODING_MAY_REQUIRE_NO_CONVERSION.
(Fwrite_region): Correct the logic for deciding coding system.

system to determine buffer_file_type.
(Fwrite_region): Only use Qbuffer_file_coding_system
before checking file-coding-system-alist if non-nil.
(Fwrite_region) [DOS_NT]: Delete conditional code.

coding conversion now takes care of NL -> CRLF.

(Fread_file_name): Convert Fcons argument to Lisp_Integer.

coding requires conversion.  Adjust end of non-matching text area
to multibyte character boundary if enable_multibyte_character is non-nil.

is nil, decode character code by emacs-mule.
(Fwrite_region): Use buffer-file-coding-system for encoding if
enable-multibyte-characters is nil.

Ffind_operation_coding_system.
(Fwrite_region):  Call Ffind_operation_coding_system.

(Finsert_file_contents): Don't give up on the fast replace method
if the coding remains undecided.

added by the previous change.
(auto_save_1): Adjusted for the above change.

Set start and end using XFASTINT.

coding-category-internal => coding-category-emacs-mule,
XXX_coding_internal => XXX_coding_emacs_mule,
coding_type_internal => coding_type_emacs_mule,
coding_type_automatic => coding_type_undecided,
CODING_CATEGORY_MASK_INTERNAL => CODING_CATEGORY_MASK_EMACS_MULE,
CODING_CATEGORY_IDX_INTERNAL => CODING_CATEGORY_IDX_EMACS_MULE,
CODING_EOL_AUTOMATIC => CODING_EOL_UNDECIDED.

Check correctly for whether no code translation is needed.

CODING_SYSTEM.  Move gap after a newline code if we are encoding
in a coding system which requires designation sequences to be put
at beginning of line.  Set coding.last_block to 1 before calling
a_write for an empty file.
(build_annotations): Code tuned up for handling
pre_write_conversion of a coding system.
(e_write): Delete code for handling carryover of code conversion.
It is now handled in encode_coding.
(auto_save_1): Supply 7th new arg CODING_SYSTEM as Qnil to
Fwrite_region.

when handling /~ and // at the end.