Support bare blocks without newlines

index.js

@@ -203,6 +203,8 @@ function bare_math_block(state, start, end, silent) {
     const endRe = /^\\end/;
 
     if (!beginRe.test(firstLine)) { return false; }
+
+    if (silent) { return true; }
 
     let next;
     for (next = start; !found;) {

test/fixtures/bare.txt

@@ -1,6 +1,4 @@
-
-
-Simple bare equation
+Simple bare block
 .
 start
 
@@ -15,4 +13,19 @@ end
 2
 \end{equation}</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1.2000000000000002em;vertical-align:-0.35000000000000003em;"></span><span class="mtable"><span class="col-align-c"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.8500000000000001em;"><span style="top:-3.01em;"><span class="pstrut" style="height:3em;"></span><span class="mord"><span class="mord">2</span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.35000000000000003em;"><span></span></span></span></span></span></span></span><span class="tag"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.8500000000000001em;"><span style="top:-2.8499999999999996em;"><span class="pstrut" style="height:2.84em;"></span><span class="eqn-num"></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.35000000000000003em;"><span></span></span></span></span></span></span></span></span></p>
 <p>end</p>
-.
+.
+
+Bare block without newlines
+.
+start
+\begin{equation}
+2
+\end{equation}
+end
+.
+<p>start</p>
+<p class="katex-block"><span class="katex-display"><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML" display="block"><semantics><mtable rowspacing="0.1600em" columnspacing="1em"><mtr><mtd class ="mtr-glue"></mtd><mtd><mstyle scriptlevel="0" displaystyle="true"><mn>2</mn></mstyle></mtd><mtd class ="mtr-glue"></mtd><mtd class ="mml-eqn-num"></mtd></mtr></mtable><annotation encoding="application/x-tex">\begin{equation}
+2
+\end{equation}</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:1.2000000000000002em;vertical-align:-0.35000000000000003em;"></span><span class="mtable"><span class="col-align-c"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.8500000000000001em;"><span style="top:-3.01em;"><span class="pstrut" style="height:3em;"></span><span class="mord"><span class="mord">2</span></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.35000000000000003em;"><span></span></span></span></span></span></span></span><span class="tag"><span class="vlist-t vlist-t2"><span class="vlist-r"><span class="vlist" style="height:0.8500000000000001em;"><span style="top:-2.8499999999999996em;"><span class="pstrut" style="height:2.84em;"></span><span class="eqn-num"></span></span></span><span class="vlist-s">​</span></span><span class="vlist-r"><span class="vlist" style="height:0.35000000000000003em;"><span></span></span></span></span></span></span></span></span></p>
+<p>end</p>
+.