code: function formatSponsors(sponsors) {
      const nonEmptySponsors = Object.keys(sponsors).filter(tier => sponsors[tier].length > 0);
  
      /* eslint-disable indent*/
      return stripIndents`<!--sponsorsstart-->
          ${
              nonEmptySponsors.map(tier => `<h3>${tier[0].toUpperCase()}${tier.slice(1)} Sponsors</h3>
              <p>${
                  sponsors[tier].map(sponsor => `<a href="${sponsor.url}"><img src="${sponsor.image}" alt="${sponsor.name}" height="${heights[tier]}"></a>`).join(" ")
              }</p>`).join("")
          }
      <!--sponsorsend-->`;
      /* eslint-enable indent*/
  }
docs: Formats an array of sponsors into HTML for the readme.
  @param {Array} sponsors The array of sponsors.
  @returns {string} The HTML for the readme.