Ignore newlines per md standard.

app/helpers/gitlab_markdown_helper.rb

@@ -35,7 +35,6 @@ module GitlabMarkdownHelper
                             # see https://github.com/vmg/redcarpet#darling-i-packed-you-a-couple-renderers-for-lunch-
                             filter_html: true,
                             with_toc_data: true,
-                            hard_wrap: true,
                             safe_links_only: true
                           }.merge(options))
       @markdown = Redcarpet::Markdown.new(gitlab_renderer,
@@ -45,7 +44,7 @@ module GitlabMarkdownHelper
                       fenced_code_blocks: true,
                       autolink: true,
                       strikethrough: true,
-                      lax_html_blocks: true,
+                      lax_spacing: true,
                       space_after_headers: true,
                       superscript: true)
     end