v4.0.0-alpha.6 kaminari のページネーションリンクに Twitter Bootstrap 4 のスタイルを適用する ref: http://qiita.com/manemone@github/items/564c58ea59fb3450826c

_first_page.html.haml

%li.page-item.prev{ class: "#{'disabled' if current_page.first?}" }
  = link_to (current_page.first? ? "#" : url), class: "page-link", "aria-label" => "First", :remote => remote do
    %span{"aria-hidden" => "true"} «
    %span.sr-only
      = t('views.pagination.first').html_safe

_gap.html.haml

%li.page-item.gap
  .page-link
    = t('views.pagination.truncate').html_safe

_last_page.html.haml

%li.page-item.next{ class: "#{'disabled' if current_page.last?}" }
  = link_to (current_page.last? ? "#" : url), class: "page-link", "aria-label" => "Last", :remote => remote do
    %span{"aria-hidden" => "true"} »
    %span.sr-only
      = t('views.pagination.last').html_safe

_next_page.html.haml

%li.page-item.next{ class: "#{'disabled' if current_page.last?}" }
  = link_to (current_page.last? ? "#" : url), class: "page-link", "aria-label" => "Next", :remote => remote do
    %span{"aria-hidden" => "true"} ›
    %span.sr-only
      = t('views.pagination.next').html_safe

_page.html.haml

%li.page-item{ class: "#{'active' if page.current?}" }
  = link_to url, class: "page-link", remote: remote do
    = page
    - if page.current?
      %span.sr-only (current)

_paginator.html.haml

= paginator.render do
  %nav.text-center
    %ul.pagination
      = first_page_tag unless current_page.first?
      = prev_page_tag unless current_page.first?
      - each_page do |page|
        - if page.left_outer? || page.right_outer? || page.inside_window?
          = page_tag page
        - elsif !page.was_truncated?
          = gap_tag
      = next_page_tag unless current_page.last?
      = last_page_tag unless current_page.last?

_prev_page.html.haml

%li.page-item.prev{ class: "#{'disabled' if current_page.first?}" }
  = link_to (current_page.first? ? "#" : url), class: "page-link", "aria-label" => "Previous", :remote => remote do
    %span{"aria-hidden" => "true"} ‹
    %span.sr-only
      = t('views.pagination.previous').html_safe