message: Cleanup
  formatting fixes
  removed redundant escapeString function
  fixed return type of isIterationStatement
  removed a comment
diff: @@ -251,7 +251,8 @@ export class LuaTransformer {
  public transformClassDeclaration(
  statement: ts.ClassLikeDeclaration,
  nameOverride?: tstl.Identifier
  - ): tstl.Statement[] {
  + ): tstl.Statement[]
  + {
  let className = statement.name ? this.transformIdentifier(statement.name) : nameOverride;
  if (!className) {
  throw TSTLErrors.MissingClassName(statement);
  @@ -2946,15 +2947,15 @@ export class LuaTransformer {
  }
  public transformStringLiteral(literal: ts.StringLiteralLike): tstl.StringLiteral {
  - const text = this.escapeString(literal.text);
  + const text = tsHelper.escapeString(literal.text);
  return tstl.createStringLiteral(text);
  }
  public transformTemplateExpression(expression: ts.TemplateExpression): tstl.BinaryExpression {
  - const parts: tstl.Expression[] = [tstl.createStringLiteral(this.escapeString(expression.head.text))];
  + const parts: tstl.Expression[] = [tstl.createStringLiteral(tsHelper.escapeString(expression.head.text))];
  expression.templateSpans.forEach(span => {
  const expr = this.transformExpression(span.expression);
  - const text = tstl.createStringLiteral(this.escapeString(span.literal.text));
  + const text = tstl.createStringLiteral(tsHelper.escapeString(span.literal.text));
  // tostring(expr).."text"
  parts.push(tstl.createBinaryExpression(
  @@ -3038,30 +3039,6 @@ export class LuaTransformer {
  tstl.createStringLiteral(identifier.text));
  }
  - public escapeString(text: string): string {
  - // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String
  - const escapeSequences: Array<[RegExp, string]> = [
  - [/[\\]/g, "\\\\"],
  - [/[\']/g, "\\\'"],
  - [/[\`]/g, "\\\`"],
  - [/[\"]/g, "\\\""],
  - [/[\n]/g, "\\n"],
  - [/[\r]/g, "\\r"],
  - [/[\v]/g, "\\v"],
  - [/[\t]/g, "\\t"],
  - [/[\b]/g, "\\b"],
  - [/[\f]/g, "\\f"],
  - [/[\0]/g, "\\0"],
  - ];
  -
  - if (text.length > 0) {
  - for (const [regex, replacement] of escapeSequences) {
  - text = text.replace(regex, replacement);
  - }
  - }
  - return text;
  - }
  -
  public transformLuaLibFunction(func: LuaLibFeature, ...params: tstl.Expression[]): tstl.CallExpression {
  this.importLuaLibFeature(func);
  const functionIdentifier = tstl.createIdentifier(`__TS__${func}`);
  