patch 9.1.0919: filetype: some assembler files are not recognized

Problem:  filetype: some assembler are files not recognized
Solution: detect '*.nasm' files as nasm filetype and '*.masm' as masm
          filetype (Wu, Zhenyu)

closes: #16194

Signed-off-by: Wu, Zhenyu <wuzhenyu@ustc.edu>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index b0c77db..eb6c3b2 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -1,4 +1,4 @@
-*syntax.txt*	For Vim version 9.1.  Last change: 2024 Nov 10
+*syntax.txt*	For Vim version 9.1.  Last change: 2024 Dec 12
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -883,12 +883,15 @@
 extensions.  Therefore you will have to select the type yourself, or add a
 line in the assembly file that Vim will recognize.  Currently these syntax
 files are included:
-	asm		GNU assembly (the default)
+	asm		GNU assembly (usually have .s or .S extension and were
+			already built using C compiler such as GCC or CLANG)
 	asm68k		Motorola 680x0 assembly
 	asmh8300	Hitachi H-8300 version of GNU assembly
 	ia64		Intel Itanium 64
 	fasm		Flat assembly (http://flatassembler.net)
-	masm		Microsoft assembly (probably works for any 80x86)
+	masm		Microsoft assembly (.masm files are compiled with
+			Microsoft's Macro Assembler. This is only supported
+			for x86, x86_64, ARM and AARCH64 CPU families)
 	nasm		Netwide assembly
 	tasm		Turbo Assembly (with opcodes 80x86 up to Pentium, and
 			MMX)
diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index fe12047..cac7c2c 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -1,7 +1,7 @@
 " Vim support file to detect file types
 "
 " Maintainer:	The Vim Project <https://github.com/vim/vim>
-" Last Change:	2024 Nov 24
+" Last Change:	2024 Dec 12
 " Former Maintainer:	Bram Moolenaar <Bram@vim.org>
 
 " Listen very carefully, I will say this only once
@@ -183,8 +183,15 @@
 
 " Assembly (all kinds)
 " *.lst is not pure assembly, it has two extra columns (address, byte codes)
+" *.[sS], *.[aA] usually Assembly - GNU
 au BufNewFile,BufRead *.asm,*.[sS],*.[aA],*.mac,*.lst	call dist#ft#FTasm()
 
+" Assembly - Netwide
+au BufNewFile,BufRead *.nasm			setf nasm
+
+" Assembly - Microsoft
+au BufNewFile,BufRead *.masm			setf masm
+
 " Assembly - Macro (VAX)
 au BufNewFile,BufRead *.mar			setf vmasm
 
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 2dc0f49..e9535bf 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -113,6 +113,7 @@
     arduino: ['file.ino', 'file.pde'],
     art: ['file.art'],
     asciidoc: ['file.asciidoc', 'file.adoc'],
+    asm: ['file.s', 'file.S', 'file.a', 'file.A'],
     asn: ['file.asn', 'file.asn1'],
     asterisk: ['asterisk/file.conf', 'asterisk/file.conf-file', 'some-asterisk/file.conf', 'some-asterisk/file.conf-file'],
     astro: ['file.astro'],
@@ -456,6 +457,7 @@
     map: ['file.map'],
     maple: ['file.mv', 'file.mpl', 'file.mws'],
     markdown: ['file.markdown', 'file.mdown', 'file.mkd', 'file.mkdn', 'file.mdwn', 'file.md'],
+    masm: ['file.masm'],
     mason: ['file.mason', 'file.mhtml'],
     master: ['file.mas', 'file.master'],
     matlab: ['file.m'],
@@ -532,6 +534,7 @@
     n1ql: ['file.n1ql', 'file.nql'],
     named: ['namedfile.conf', 'rndcfile.conf', 'named-file.conf', 'named.conf', 'rndc-file.conf', 'rndc-file.key', 'rndc.conf', 'rndc.key'],
     nanorc: ['/etc/nanorc', 'file.nanorc', 'any/etc/nanorc'],
+    nasm: ['file.nasm'],
     natural: ['file.NSA', 'file.NSC', 'file.NSG', 'file.NSL', 'file.NSM', 'file.NSN', 'file.NSP', 'file.NSS'],
     ncf: ['file.ncf'],
     neomuttlog: ['/home/user/.neomuttdebug1'],
diff --git a/src/version.c b/src/version.c
index 4fb60ac..5059658 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    919,
+/**/
     918,
 /**/
     917,