From 976ebb116b6ab1c98d712da37698321818d74ec5 Mon Sep 17 00:00:00 2001
From: John McLear <john@mclear.co.uk>
Date: Mon, 6 Apr 2026 12:04:22 +0100
Subject: [PATCH] fix: update indentation regex to match non-breaking spaces

The auto-indent regex /^ */ only matched regular spaces. After
preserving nbsp characters, browsers may use \xa0 for leading
whitespace, causing auto-indentation to fail. Updated to /^[ \xa0]*/.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
---
 src/static/js/ace2_inner.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/static/js/ace2_inner.ts b/src/static/js/ace2_inner.ts
index e1f5a90a9..daca0af50 100644
--- a/src/static/js/ace2_inner.ts
+++ b/src/static/js/ace2_inner.ts
@@ -1270,7 +1270,7 @@ function Ace2Inner(editorInfo, cssManagers) {
       const thisLine = rep.lines.atIndex(lineNum);
       const prevLine = rep.lines.prev(thisLine);
       const prevLineText = prevLine.text;
-      let theIndent = /^ *(?:)/.exec(prevLineText)[0];
+      let theIndent = /^[ \xa0]*(?:)/.exec(prevLineText)[0];
       const shouldIndent = window.clientVars.indentationOnNewLine;
       if (shouldIndent && /[[(:{]\s*$/.exec(prevLineText)) {
         theIndent += THE_TAB;