Function formatDiagnostics

packages/just-bash-executor/src/docs.test.ts:55–73

(
  diagnostics: ts.Diagnostic[],
  source: string,
)

}

function formatDiagnostics(
  diagnostics: ts.Diagnostic[],
  source: string,
): string {
  return diagnostics
    .map((d) => {
      const message = ts.flattenDiagnosticMessageText(d.messageText, "\n");
      if (d.file && d.start !== undefined) {
        const { line, character } = d.file.getLineAndCharacterOfPosition(
          d.start,
        );
        const lines = source.split("\n");
        const ctx = lines[line] ?? "";
        return `  line ${line + 1}:${character + 1}: ${message}\n    | ${ctx}`;
      }
      return `  ${message}`;
    })
    .join("\n");
}

describe("README.md", () => {
  it("exists and has substantive content", () => {