fix(57590): [Formatting] Remove spaces between ... and type name in tuple spread (microsoft#57604)

Author: idango10

src/services/formatting/rules.ts

@@ -398,6 +398,9 @@ export function getAllRules(): RuleSpec[] {
         // Remove extra space between for and await
         rule("SpaceBetweenForAndAwaitKeyword", SyntaxKind.ForKeyword, SyntaxKind.AwaitKeyword, [isNonJsxSameLineTokenContext], RuleAction.InsertSpace),
 
+        // Remove extra spaces between ... and type name in tuple spread
+        rule("SpaceBetweenDotDotDotAndTypeName", SyntaxKind.DotDotDotToken, typeNames, [isNonJsxSameLineTokenContext], RuleAction.DeleteSpace),
+
         // Add a space between statements. All keywords except (do,else,case) has open/close parens after them.
         // So, we have a rule to add a space for [),Any], [do,Any], [else,Any], and [case,Any]
         rule(

tests/cases/fourslash/formatRemoveSpaceBetweenDotDotDotAndTypeName.ts

@@ -0,0 +1,12 @@
+/// <reference path="fourslash.ts"/>
+
+//// let a: [... any[]];
+//// let b: [...   number[]];
+//// let c: [...     string[]];
+
+format.document();
+verify.currentFileContentIs(
+    `let a: [...any[]];
+let b: [...number[]];
+let c: [...string[]];`
+);