JS: Fix multiple-comments-on-same-line format (#9672)

Co-authored-by: Georgii Dolzhykov <thorn.mailbox@gmail.com>

changelog_unreleased/javascript/9672.md

@@ -0,0 +1,27 @@
+#### Improve comment format (#9672 by @fisker)
+
+When multiple comments on same line, the result became unstable.
+
+<!-- prettier-ignore -->
+```jsx
+// Input
+a;
+/*1*//*2*/
+/*3*/
+b;
+
+// Prettier stable
+a; /*2*/
+/*1*/ /*3*/
+b;
+
+// Prettier stable (second format)
+a; /*2*/ /*3*/
+/*1*/ b;
+
+// Prettier master
+a;
+/*1*/ /*2*/
+/*3*/
+b;
+```