Use variant form for more primes in SVG output (match HTML-CSS output). Resolves problem identified by Fred in issue #268.

Author: dpvc

config/TeX-AMS-MML_SVG-full.js

@@ -1265,7 +1265,7 @@
         //
         //  Primes must come from another font
         //
-        if (isScript && this.data.join("").match(/\u2032/))
+        if (isScript && this.data.join("").match(/['`"\u00B4\u2032-\u2037]/))
           {variant = SVG.FONTDATA.VARIANT["-TeX-variant"]}
         //
         //  Typeset contents