fixes #574

Excluding math types?

Author: clapierre

a11y-meta-display-guide/2.0/draft/techniques/epub-metadata/index.html

@@ -757,11 +757,11 @@ <h4>Instructions</h4>
 						<span><b>THEN</b> display <code id="rich-content-accessible-math-as-mathml">"Math as MathML"</code>.</span>
 					</li>
 					<li>
-						<span><b>ELSE IF</b> <var>math_formula_as_latex</var>:</span>
+						<span><b>IF</b> <var>math_formula_as_latex</var>:</span>
 						<span><b>THEN</b> display <code id="rich-content-accessible-math-as-latex">"Math as LaTex"</code>.</span>
 					</li>
 					<li>
-						<span><b>ELSE IF</b> <var>contains_math_formula</var>:</span>
+						<span><b>IF</b> <var>contains_math_formula</var>:</span>
 						<span><b>THEN</b> display <code id="rich-content-accessible-math-described">"Math as images with text description"</code>.</span>
 					</li>
 					<li>