message: Update rust-style-guide.md
diff: @@ -195,10 +195,10 @@ A source note comment is broken into two parts:
  descriptive, and make sure you search for it before using it, in case it is
  already in use.
  2. **Source Note:** This is the comment itself, which is a large block comment
  - placed after the first function in which it is referred to in the module. It
  - uses the scala block-comment syntax `/* ... */`, and the first line names
  - the note using the same referrer as above: `/* Note [Note Name]`. The name(s)
  - in the note are underlined using a string of the `~` (tilde) character.
  + placed after the first function in which it is referred to in the module. The
  + first line names the note using the same referrer as above:
  + `// Note [Note Name]`. The name(s) in the note are underlined using a string
  + of the `=` (equals) character.
  A source note may contain sections within it where necessary. These are titled
  using the following syntax: `== Note [Note Name (Section Name)]`, and can be
  @@ -224,11 +224,10 @@ pub trait Tree<T> {
  // ...
  }
  - /* Note [Buffer Size]
  - * ~~~~~~~~~~~~~~~~~~
  - * When working with the buffer for the tree walk, it is important that you
  - * ensure....
  - */
  + // Note [Buffer Size]
  + // ==================
  + // When working with the buffer for the tree walk, it is important that you
  + // ensure....
  fn getBuffer(self: &Self) -> Vec<T> {
  // ...
  