Add 2 test cases

Added one test case to check that math blocks render correctly when preceeded by an alphanumerical character, and another one for when it is succeeded by an alphanumerical character.

Signed-off-by: João Tiago <joao.leal.tintas@tecnico.ulisboa.pt>

Author: jmlt2002

modules/markup/markdown/markdown_test.go

@@ -519,6 +519,14 @@ func TestMathBlock(t *testing.T) {
 			`a$b $a a$b b$`,
 			`<p>a<code class="language-math is-loading">b </code>a a<code class="language-math is-loading">b b</code></p>` + nl,
 		},
+		{
+			"a$x$",
+			`<p>a<code class="language-math is-loading">x</code></p>` + nl,
+		},
+		{
+			"$x$a",
+			`<p><code class="language-math is-loading">x</code>a</p>` + nl,
+		},
 		{
 			"$$a$$",
 			`<pre class="code-block is-loading"><code class="chroma language-math display">a</code></pre>` + nl,