diff --git a/runtime/doc/options.txt b/runtime/doc/options.txt
index bfdc09662e..1d6bfd38fa 100644
--- a/runtime/doc/options.txt
+++ b/runtime/doc/options.txt
@@ -4422,11 +4422,11 @@ A jump table for the options with a short description can be found at |Q_op|.
 	copy of the original file will be kept.  The name of the copy is the
 	name of the original file with the string in the 'patchmode' option
 	appended.  This option should start with a dot.  Use a string like
-	".org".  'backupdir' must not be empty for this to work (Detail: The
-	backup file is renamed to the patchmode file after the new file has
-	been successfully written, that's why it must be possible to write a
-	backup file).  If there was no file to be backed up, an empty file is
-	created.
+	".orig" or ".org".  'backupdir' must not be empty for this to work
+	(Detail: The backup file is renamed to the patchmode file after the
+	new file has been successfully written, that's why it must be possible
+	to write a backup file).  If there was no file to be backed up, an
+	empty file is created.
 	When the 'backupskip' pattern matches, a patchmode file is not made.
 	Using 'patchmode' for compressed files appends the extension at the
 	end (e.g., "file.gz.orig"), thus the resulting name isn't always
diff --git a/runtime/ftplugin/cmake.vim b/runtime/ftplugin/cmake.vim
new file mode 100644
index 0000000000..e81cd4071c
--- /dev/null
+++ b/runtime/ftplugin/cmake.vim
@@ -0,0 +1,16 @@
+" Vim filetype plugin
+" Language:    CMake
+" Maintainer:  Keith Smiley <keithbsmiley@gmail.com>
+" Last Change: 2017 Dec 24
+
+" Only do this when not done yet for this buffer
+if exists("b:did_ftplugin")
+  finish
+endif
+
+" Don't load another plugin for this buffer
+let b:did_ftplugin = 1
+
+let b:undo_ftplugin = "setl commentstring<"
+
+setlocal commentstring=#\ %s
diff --git a/runtime/syntax/mix.vim b/runtime/syntax/mix.vim
index 9ab98eacf8..564d344cc8 100644
--- a/runtime/syntax/mix.vim
+++ b/runtime/syntax/mix.vim
@@ -2,7 +2,7 @@
 " Language:	MIX (Donald Knuth's assembly language used in TAOCP)
 " Maintainer:	Wu Yongwei <wuyongwei@gmail.com>
 " Filenames:	*.mixal *.mix
-" Last Change:  2013 Nov 13
+" Last Change:  2017-11-26 15:21:36 +0800
 
 " Quit when a syntax file was already loaded
 if exists("b:current_syntax")
@@ -16,7 +16,7 @@ syn case ignore
 
 " Special processing of ALF directive: implementations vary whether quotation
 " marks are needed
-syn match mixAlfParam		#\s\{1,2\}"\?[^"]\{,5\}"\?# contains=mixAlfDirective,mixString nextgroup=mixEndComment contained
+syn match mixAlfParam		#\s\{1,2\}"\?[^"]\{,5\}"\?# contains=mixString nextgroup=mixEndComment contained
 
 " Region for parameters
 syn match mixParam		#[-+*/:=0-9a-z,()"]\+# contains=mixIdentifier,mixSpecial,mixNumber,mixString,mixLabel nextgroup=mixEndComment contained
@@ -46,6 +46,7 @@ syn keyword mixDirective 	ALF nextgroup=mixAlfParam contained
 " Opcodes
 syn keyword mixOpcode	NOP HLT NUM CHAR FLOT FIX nextgroup=mixEndComment contained
 syn keyword mixOpcode	FADD FSUB FMUL FDIV FCMP MOVE ADD SUB MUL DIV IOC IN OUT JRED JBUS JMP JSJ JOV JNOV JL JE JG JLE JNE JGE SLA SRA SLAX SRAX SLC SRC nextgroup=mixParam contained skipwhite
+syn keyword mixOpcode	SLB SRB JAE JAO JXE JXO nextgroup=mixParam contained skipwhite
 
 syn match mixOpcode	"LD[AX1-6]N\?\>" nextgroup=mixParam contained skipwhite
 syn match mixOpcode	"ST[AX1-6JZ]\>" nextgroup=mixParam contained skipwhite
@@ -58,7 +59,7 @@ syn match mixOpcode	"J[AX1-6]N\?[NZP]\>" nextgroup=mixParam contained skipwhite
 " Switch back to being case sensitive
 syn case match
 
-" Registers (only to used in comments now)
+" Registers (only to be used in comments now)
 syn keyword mixRegister	rA rX rI1 rI2 rI3 rI4 rI5 rI6 rJ contained
 
 " The default highlighting