Merge pull request #19141 from amcasey/MissingNewlineAtEOF

Insert a line break before a function at EOF if needed

src/harness/unittests/tsserverProjectSystem.ts

@@ -4526,7 +4526,7 @@ namespace ts.projectSystem {
                             {
                                 start: { line: 3, offset: 2 },
                                 end: { line: 3, offset: 2 },
-                                newText: "\nfunction newFunction() {\n  1;\n}\n",
+                                newText: "\n\nfunction newFunction() {\n  1;\n}\n",
                             },
                         ]
                     }

src/services/refactors/extractSymbol.ts

@@ -785,7 +785,10 @@ namespace ts.refactor.extractSymbol {
             changeTracker.insertNodeBefore(context.file, nodeToInsertBefore, newFunction, { suffix: context.newLineCharacter + context.newLineCharacter });
         }
         else {
-            changeTracker.insertNodeBefore(context.file, scope.getLastToken(), newFunction, { prefix: context.newLineCharacter, suffix: context.newLineCharacter });
+            changeTracker.insertNodeBefore(context.file, scope.getLastToken(), newFunction, {
+                prefix: isLineBreak(file.text.charCodeAt(scope.getLastToken().pos)) ? context.newLineCharacter : context.newLineCharacter + context.newLineCharacter,
+                suffix: context.newLineCharacter
+            });
         }
 
         const newNodes: Node[] = [];