fix: regex for detecting preview url (#853)

* fix: regex for detecting preview url

Fixes #852

* Add changelog entry

---------

Co-authored-by: elliot <[email protected]>

Author: daniel-eder

apps/vscode/CHANGELOG.md

@@ -3,6 +3,7 @@
 ## 1.127.0 (Unreleased)
 
 - Added a new setting `quarto.useBundledQuartoInPositron` to prefer the Quarto CLI bundled with Positron when available. This setting has precedence _between_ `quarto.path` and `quarto.usePipQuarto`, and has no effect outside of Positron (<https://github.com/quarto-dev/quarto/pull/841>).
+- Fixed a bug where previewing showed "Not Found" on Quarto files with spaces in the name in subfolders of projects (<https://github.com/quarto-dev/quarto/pull/853>).
 
 ## 1.126.0 (Release on 2025-10-08)
 

apps/vscode/src/providers/preview/preview.ts

@@ -531,7 +531,7 @@ class PreviewManager {
         // capture preview command url and preview url
         this.previewCommandUrl_ = match[1];
         const browseMatch = this.previewOutput_.match(
-          /(Browse at|Listening on) (https?:\/\/[^\n]*)/
+          /(Browse at|Listening on)\s+(https?:\/\/[^\n]*)/
         );
         if (browseMatch) {
           // earlier versions of quarto serve didn't print out vscode urls