patch 9.1.0276: No pandoc syntax support

Problem:  No pandoc syntax support
Solution: Add pandoc syntax and compiler plugins
          (Wu, Zhenyu, Konfekt)

closes: #14389

Co-authored-by: Konfekt <Konfekt@users.noreply.github.com>
Signed-off-by: Wu, Zhenyu <wuzhenyu@ustc.edu>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/test_filetype.vim b/src/testdir/test_filetype.vim
index 6021e96..03af297 100644
--- a/src/testdir/test_filetype.vim
+++ b/src/testdir/test_filetype.vim
@@ -517,6 +517,7 @@
     pacmanlog: ['pacman.log'],
     pamconf: ['/etc/pam.conf', '/etc/pam.d/file', 'any/etc/pam.conf', 'any/etc/pam.d/file'],
     pamenv: ['/etc/security/pam_env.conf', '/home/user/.pam_environment', '.pam_environment', 'pam_env.conf'],
+    pandoc: ['file.pandoc', 'file.pdk', 'file.pd', 'file.pdc'],
     papp: ['file.papp', 'file.pxml', 'file.pxsl'],
     pascal: ['file.pas', 'file.dpr', 'file.lpr'],
     passwd: ['any/etc/passwd', 'any/etc/passwd-', 'any/etc/passwd.edit', 'any/etc/shadow', 'any/etc/shadow-', 'any/etc/shadow.edit', 'any/var/backups/passwd.bak', 'any/var/backups/shadow.bak', '/etc/passwd', '/etc/passwd-', '/etc/passwd.edit', '/etc/shadow', '/etc/shadow-', '/etc/shadow.edit', '/var/backups/passwd.bak', '/var/backups/shadow.bak'],
diff --git a/src/version.c b/src/version.c
index fb72324..bd9f072 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    276,
+/**/
     275,
 /**/
     274,