Bug Fixes

• $core: #2627 Dup ID violates HTML5-4 (#2650) (931e7d9)
• adds accessibility to code-group component (#2630) (35865ec)
• scroll hash encoded when non-english chars are used fix #2633 (#2639) (5fcbd88)
• textlint bug causing PR's to fail checks fix #2636 (#2637) (64e92ca)

Features

• $core: add canonical link to frontmatter (#2658) (ff6c51a)