Simplify and generalize semicolon as statement ender implementation

baselines/reference/terminator.js.baseline

@@ -1 +1 @@
-"var x = 1;\nvar y = 2;\nvar z = 3;\nx;\ny;\nz"
+"var x = 1;\nvar y = 2;\nvar z = 3;\nx;\ny;\nz;\n"

src/emit.ts

@@ -18,7 +18,9 @@ const escapedCharsMap = new Map(
 );
 
 export function emit(statements: Statement[]) {
-  return statements.map(emitStatement).join(';\n');
+  return statements
+    .map((statement) => `${emitStatement(statement)};\n`)
+    .join('');
 }
 
 function emitStatement(statement: Statement): string {

src/parse.ts

@@ -18,7 +18,7 @@ export function parse(lexer: Lexer): Module {
       statements: parseStatements(
         parseStatement,
         () => tryParseToken(Token.Semicolon),
-        () => lexer.token() === Token.Semicolon,
+        () => lexer.token() !== Token.EOF,
       ),
       locals: new Map(),
     };
@@ -110,13 +110,10 @@ export function parse(lexer: Lexer): Module {
     terminator: () => boolean,
     peek: () => boolean,
   ) {
-    const list = [element()];
-    while (lexer.token() !== Token.EOF) {
-      if (terminator()) {
-        if (peek()) list.push(element());
-      } else {
-        list.push(element());
-      }
+    const list = [];
+    while (peek()) {
+      list.push(element());
+      terminator();
     }
     return list;
   }