Update runtime files
diff --git a/runtime/doc/syntax.txt b/runtime/doc/syntax.txt
index 3bc5cf4..0101b51 100644
--- a/runtime/doc/syntax.txt
+++ b/runtime/doc/syntax.txt
@@ -3196,6 +3196,14 @@
For more detailed instructions see |ft_sql.txt|.
+SQUIRREL *squirrel.vim* *ft-squirrel-syntax*
+
+Squirrel is a high level imperative, object-oriented programming language,
+designed to be a light-weight scripting language that fits in the size, memory
+bandwidth, and real-time requirements of applications like video games. Files
+with the following extensions are recognized as squirrel files: .nut.
+
+
TCSH *tcsh.vim* *ft-tcsh-syntax*
This covers the shell named "tcsh". It is a superset of csh. See |csh.vim|