message: Update manifest.md
  Remove comment from example toml to prose.
diff: @@ -361,10 +361,12 @@ script guide.
  [links]: build-scripts.md#the-links-manifest-key
  +For example, a crate that links a native library called "git2" (e.g. `libgit2.a`
  +on Linux) may specify:
  +
  ```toml
  [package]
  # ...
  -# this package links with a native library called "git2", e.g. "libgit2.a" on Linux
  links = "git2"
  ```
  