Minor changes and fixes to add-new-language script

scripts/new-lang-template/common.ts

@@ -7,11 +7,9 @@ export type RS = {
 };
 
 /** Sample program */
-export const sampleProgram = [
-  "Program line 1",
-  "Program line 2",
-  "Program line 3",
-].join("\n");
+export const sampleProgram = `Program line 1
+Program line 2
+Program line 3`;
 
 /** Syntax highlighting */
 export const editorTokensProvider: MonacoTokensProvider = {

scripts/new-lang-template/runtime.ts

@@ -17,6 +17,6 @@ export default class XYZLanguageEngine implements LanguageEngine<RS> {
 
   executeStep(): StepExecutionResult<RS> {
     // TODO: Unimplemented
-    return { rendererState: { value: 0 }, nextStepLocation: { line: 0 } };
+    return { rendererState: { value: 0 }, nextStepLocation: { startLine: 0 } };
   }
 }