message: [src/doc/book] Apply 01-*.md changes into index.md
diff: @@ -4,8 +4,8 @@ crates-io.md book/src/03-06-crates-io.md
  environment-variables.md book/src/03-04-environment-variables.md
  external-tools.md book/src/03-09-external-tools.md
  faq.md book/src/faq.md
  -guide.md book/src/guide.md
  -index.md
  +guide.md book/src/guide.md book/src/02-*.md
  +index.md book/src/SUMMARY.md book/src/01-*.md
  manifest.md
  pkgid-spec.md
  policies.md
  