From 0835a7821cb912f9f58bddbc9563c8124155033f Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Wed, 10 Mar 2021 04:37:04 -0500
Subject: [PATCH] cope with odd svg content-types (#3173)

Fixes #3072
---
 build/flaws.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/build/flaws.js b/build/flaws.js
index a50ad0a51712..5b449558cd77 100644
--- a/build/flaws.js
+++ b/build/flaws.js
@@ -591,7 +591,9 @@ async function fixFixableFlaws(doc, options, document) {
         if (
           !fileType &&
           flaw.src.toLowerCase().endsWith(".svg") &&
-          imageResponse.headers["content-type"] === "image/svg+xml"
+          imageResponse.headers["content-type"]
+            .toLowerCase()
+            .startsWith("image/svg+xml")
         ) {
           // If the SVG doesn't have the `<?xml version="1.0" encoding="UTF-8"?>`
           // and/or the `<!DOCTYPE svg PUBLIC ...` in the first couple of bytes