Function joinWithFileBoundaries

packages/challenge-builder/src/build.ts:60–60

(contents: string[])

// an index.ts first-line declaration can be concatenated onto empty/no-newline
// HTML or CSS, so AST checks fail.
const joinWithFileBoundaries = (contents: string[]) => contents.join('\n');

function buildSourceMap(challengeFiles: ChallengeFile[]): Source | undefined {
  // TODO: rename sources.index to sources.contents.