Update runtime files
diff --git a/runtime/autoload/dist/ft.vim b/runtime/autoload/dist/ft.vim
index e48575c..5db68d3 100644
--- a/runtime/autoload/dist/ft.vim
+++ b/runtime/autoload/dist/ft.vim
@@ -348,7 +348,7 @@
setf idl
enddef
-# Distinguish between "default" and Cproto prototype file. */
+# Distinguish between "default", Prolog and Cproto prototype file.
export def ProtoCheck(default: string)
# Cproto files have a comment in the first line and a function prototype in
# the second line, it always ends in ";". Indent files may also have
@@ -358,7 +358,14 @@
if getline(2) =~ '.;$'
setf cpp
else
- exe 'setf ' .. default
+ # recognize Prolog by specific text in the first non-empty line
+ # require a blank after the '%' because Perl uses "%list" and "%translate"
+ var l = getline(nextnonblank(1))
+ if l =~ '\<prolog\>' || l =~ '^\s*\(%\+\(\s\|$\)\|/\*\)' || l =~ ':-'
+ setf prolog
+ else
+ exe 'setf ' .. default
+ endif
endif
enddef