favicons fallback on raster.png due to smart quote in inst/BS5/templates/head.html #3005

Note: This was found with assistance from Claude.

The SVG favicon <link> in inst/BS5/templates/head.html wraps the type value in curly/smart quotes (”…”, U+201D) instead of straight quotes:

See

Because type="image/svg+xml" is malformed, browsers can't parse the link and ignore favicon.svg, falling back to the raster .ico/PNG. Sites whose raster favicon is lower quality then get a pixelated tab icon even though a crisp favicon.svg exists and is being copied to the site root.

Fix by replacing smart quote with straight quote

Potentially introduced in #2804 (smart-quote autocorrect when pasting the favicon snippet).