fix suffix newline

Author: gabritto

src/services/textChanges.ts

@@ -645,7 +645,7 @@ export class ChangeTracker {
         const pos = sourceFile.end + 1;
         const options = {
             prefix: this.newLineCharacter,
-            suffix: blankLineBetween ? this.newLineCharacter : "",
+            suffix: this.newLineCharacter + (blankLineBetween ? this.newLineCharacter : ""),
         };
         this.insertNodesAt(sourceFile, pos, insert, options);
     }

tests/cases/fourslash/moveToFile_blankExistingFile.ts

@@ -25,7 +25,8 @@ import { p } from './a';
 import { b } from "./other";
 
 
-const y: Date = p + b;`,
+const y: Date = p + b;
+`,
     },
     interactiveRefactorArguments: {targetFile: "/bar.ts"},
 });

tests/cases/fourslash/moveToFile_differentDirectories2.ts

@@ -28,7 +28,8 @@ y;`,
 import { b } from "../dir1/other";
 
 
-export const y = b + a;`,
+export const y = b + a;
+`,
     },
     interactiveRefactorArguments: { targetFile: "/src/dir2/bar.ts" }
 });