Merge branch 'master' into wikimedia-projects

      env: PY=2

    - python: "3.5"

    - python: "3.6"

    - python: "3.7"

    - python: "3.8"

    - stage: docker

      python: "3.6"

      python: "3.8"

      git:

        depth: false

      services:

    engine : seedpeer

    categories: files, music, videos

  - name : rubygems

    shortcut: rbg

    engine: xpath

    paging : True

    search_url : https://rubygems.org/search?page={pageno}&query={query}

    results_xpath: /html/body/main/div/a[@class="gems__gem"]

    url_xpath : ./@href

    title_xpath : ./span/h2

    content_xpath : ./span/p

    suggestion_xpath : /html/body/main/div/div[@class="search__suggestions"]/p/a

    first_page_num : 1

    categories: it

    disabled : True

#  - name : yacy

#    engine : yacy

#    shortcut : ya