fix: highlight docstrip guards with a negated expression (v0.2.2)

Downstream report: %<*!driver>, %</!spa>, %<+!driver> rendered as plain
text while %<*driver> / %<*fd|zhmap> worked. The marker charclass ate a
single [*/+!-], so a * or / followed by a ! (negated docstrip expression)
failed the expression sub-match and the whole guard went unhighlighted.

Split marker ([*/+-]?) from the boolean expression (may start with ! or (),
matching all docstrip forms. Verified end-to-end through the real DocTeX +
expl3 grammar chain; added the reported forms to the fixture.

Author: Liam0205

CHANGELOG.md

@@ -1,5 +1,14 @@
 # Changelog
 
+## [0.2.2] - 2026-07-06
+
+### Fixed
+
+- docstrip guards with a negated expression — `%<*!driver>`, `%</!spa>`,
+  `%<+!driver>` — were not highlighted. The marker (`*`/`/`/`+`/`-`) and the
+  boolean expression (which may start with `!` or `(`) are now matched
+  separately, so all docstrip forms highlight correctly.
+
 ## [0.2.1] - 2026-07-06
 
 ### Added

package.json

@@ -2,7 +2,7 @@
   "name": "expl3-vscode",
   "displayName": "expl3 (LaTeX3) Language Support",
   "description": "Syntax highlighting and explcheck diagnostics for expl3 (LaTeX3) code.",
-  "version": "0.2.1",
+  "version": "0.2.2",
   "publisher": "CTeX-org",
   "license": "MIT",
   "icon": "images/icon.png",

syntaxes/expl3.tmLanguage.json

@@ -22,8 +22,8 @@
           }
         },
         {
-          "comment": "docstrip open/close/single guard: %<*tag>, %</tag>, %<+tag>, %<!tag>, %<tag>",
-          "match": "(?x) ^ (%) (<) ([*/+!-]?) ([A-Za-z_][A-Za-z0-9_|&!,+-]*) (>)",
+          "comment": "docstrip block/inline guard: %<*expr>, %</expr>, %<+expr>, %<expr>. The optional *,/,+,- marker selects the block direction; expr is a docstrip boolean expression that may itself start with ! (negation) or ( and use |, &, ! operators, e.g. %<*!driver>, %<*fd|zhmap>, %<*a&!b>.",
+          "match": "(?x) ^ (%) (<) ([*/+-]?) ([A-Za-z_!(][A-Za-z0-9_|&!,+()-]*) (>)",
           "captures": {
             "1": { "name": "punctuation.definition.comment.tex" },
             "2": { "name": "punctuation.definition.tag.docstrip.expl3" },

tests/fixtures/xeCJK-sample.dtx

@@ -76,3 +76,11 @@
 %<*!driver&(package|config)>
 % conditional guarded region using boolean expressions
 %</!driver&(package|config)>
+
+% docstrip marker + negated expression (from ctex-fontset.dtx; issue: these
+% must highlight just like the plain forms above)
+%<*!driver>
+%<+!driver>\GetIdInfo $Id: demo.dtx 1.0 2026-01-01 A B <a@b.c>$
+%</!driver>
+%<*!spa>
+%</!spa>