anchor.diff:          :markdown
             #### Naming
   
  -          Block name may consist of Latin letters, digits, and dashes. To form a CSS class, add short prefix for namespacing: `.block`
  +          Block names may consist of Latin letters, digits, and dashes. To form a CSS class, add a short prefix for namespacing: `.block`
         .grid__cell-md.grid__cell-md_size_4.grid__cell_left-border.raw-text
           :markdown
             #### HTML
  
positive.code:       .grid__cell-xs.grid__cell-xs_size_12.raw-text
          :markdown
            ## Example
            Suppose you have block `form` with modifiers `theme: 'xmas'` and `simple: true` and with elements `input` and `submit`, and element `submit` have it's own modifier `disabled: true` for not submitting form while it's not filled:
      .grid__row
        .grid__cell-md.grid__cell-md_size_6.raw-text
          :markdown
  
negative.code:       .grid__cell-md.grid__cell-md_size_4.grid__cell_left-border.raw-text
          :markdown
            #### Naming
            Element names may consist of Latin letters, digits, and dashes.
            CSS class is formed as block name plus two underscores plus element name:
            `.block__elem`
        .grid__cell-md.grid__cell-md_size_4.grid__cell_left-border.raw-text
  