Never put spaces to the right of stars in indentable block comments

src/language-js/printer-estree.js

@@ -6165,8 +6165,9 @@ function printIndentableBlockComment(comment) {
       hardline,
       lines.map(
         (line, index) =>
-          (index === 0 && line[0] === "*" ? "" : " ") +
-          (index < lines.length - 1 ? line.trim() : line.trimLeft())
+          index === 0
+            ? line.trimRight()
+            : " " + (index < lines.length - 1 ? line.trim() : line.trimLeft())
       )
     ),
     "*/"

tests/comments/__snapshots__/jsfmt.spec.js.snap

@@ -1735,6 +1735,19 @@ if(true) {
   /* first line
 * second line
    * third line */
+
+  /*! first line
+*second line
+   *  third line */
+
+/*!
+* Extracted from vue codebase
+* https://github.com/vuejs/vue/blob/cfd73c2386623341fdbb3ac636c4baf84ea89c2c/src/compiler/parser/html-parser.js
+* HTML Parser By John Resig (ejohn.org)
+* Modified by Juriy "kangax" Zaytsev
+* Original code by Erik Arvidsson, Mozilla Public License
+* http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
+*/
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 /*
  * Looking good!
@@ -1754,6 +1767,19 @@ if (true) {
  * second line
  * third line */
 
+/*! first line
+ *second line
+ *  third line */
+
+/*!
+ * Extracted from vue codebase
+ * https://github.com/vuejs/vue/blob/cfd73c2386623341fdbb3ac636c4baf84ea89c2c/src/compiler/parser/html-parser.js
+ * HTML Parser By John Resig (ejohn.org)
+ * Modified by Juriy "kangax" Zaytsev
+ * Original code by Erik Arvidsson, Mozilla Public License
+ * http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
+ */
+
 `;
 
 exports[`switch.js - flow-verify 1`] = `

tests/comments/single-star-jsdoc.js

@@ -15,3 +15,16 @@ if(true) {
   /* first line
 * second line
    * third line */
+
+  /*! first line
+*second line
+   *  third line */
+
+/*!
+* Extracted from vue codebase
+* https://github.com/vuejs/vue/blob/cfd73c2386623341fdbb3ac636c4baf84ea89c2c/src/compiler/parser/html-parser.js
+* HTML Parser By John Resig (ejohn.org)
+* Modified by Juriy "kangax" Zaytsev
+* Original code by Erik Arvidsson, Mozilla Public License
+* http://erik.eae.net/simplehtmlparser/simplehtmlparser.js
+*/