Bug 1465020 - Do not trim whitespace from variable font axis tag names. r=gl

MozReview-Commit-ID: 6pdCAPhJHze

--HG--
extra : rebase_source : b3fa41e4e71b9a161932455db3341d019568fa1c

devtools/client/inspector/fonts/utils/font-utils.js

@@ -67,9 +67,12 @@ module.exports = {
       .reduce((acc, pair) => {
         // Tags are always in quotes. Split by quote and filter excessive whitespace.
         pair = pair.split(/["']/).filter(part => part.trim() !== "");
-        const tag = pair[0].trim();
+        const tag = pair[0];
         const value = pair[1].trim();
-        acc[tag] = value;
+        // Axis tags shorter or longer than 4 characters are invalid. Whitespace is valid.
+        if (tag.length === 4) {
+          acc[tag] = value;
+        }
         return acc;
       }, {});