diff --git a/packages/babel-generator/src/buffer.js b/packages/babel-generator/src/buffer.js
index 204641d60d..0b691e4be0 100644
--- a/packages/babel-generator/src/buffer.js
+++ b/packages/babel-generator/src/buffer.js
@@ -335,8 +335,6 @@ export default class Buffer {
    */
 
   endsWith(str: string): boolean {
-    if (Array.isArray(str)) return str.some((s) => this.endsWith(s));
-
     if (str.length === 1) {
       return this.last === str;
     } else {
diff --git a/packages/babel-generator/src/printer.js b/packages/babel-generator/src/printer.js
index f14ca8f99e..3efe5437c2 100644
--- a/packages/babel-generator/src/printer.js
+++ b/packages/babel-generator/src/printer.js
@@ -266,7 +266,7 @@ export default class Printer extends Buffer {
       // whitespace before
       this.newline(this.whitespace.getNewlinesBefore(comment));
 
-      if (!this.endsWith(["[", "{"])) this.space();
+      if (!this.endsWith("[") && !this.endsWith("{")) this.space();
 
       let val    = this.generateComment(comment);