runtime(skill): Update syntax file to fix string escapes

The syntax script allowed for single backslash escapes like this
"string\""
But did not accommodate for the uncommon case:
"<key>\\"
Let's fix this by also skipping over double backslashes in the
skillString region.

closes: #15832

Signed-off-by: Simão Afonso @ Powertools Tech <simao.afonso@powertools-tech.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

diff --git a/runtime/syntax/skill.vim b/runtime/syntax/skill.vim
index 47afffc0a9d959c58216d7f9d19f36b70becd282..dd4c191b6f5a82c3ae43ab839f5ee1d7e5325c3a 100644 (file)
--- a/runtime/syntax/skill.vim
+++ b/runtime/syntax/skill.vim
@@ -1,13 +1,14 @@
 " Vim syntax file
 " Language:            SKILL
 " Maintainer:  Toby Schaffer <jtschaff@eos.ncsu.edu>
-" Last Change: 2003 May 11
 " Comments:            SKILL is a Lisp-like programming language for use in EDA
 "                              tools from Cadence Design Systems. It allows you to have
 "                              a programming environment within the Cadence environment
 "                              that gives you access to the complete tool set and design
 "                              database. This file also defines syntax highlighting for
 "                              certain Design Framework II interface functions.
+" Last Change: 2003 May 11
+" 2024 Oct 08 by Vim Project: allow double backslashes in skillString
 
 " quit when a syntax file was already loaded
 if exists("b:current_syntax")
@@ -509,7 +510,7 @@ syn match skilltechFunctions                "(\(tech\|tc\)\u\a\+\>"hs=s+1
 syn match skilltechFunctions           "\<\(tech\|tc\)\u\a\+("he=e-1
 
 " strings
-syn region skillString                         start=+"+ skip=+\\"+ end=+"+
+syn region skillString                         start=+"+ skip=+\\\@<!\\"+ end=+"+
 
 syn keyword skillTodo contained                TODO FIXME XXX
 syn keyword skillNote contained                NOTE IMPORTANT