Docs: Avoid Kramdown warnings

docs/_docs/history.md

@@ -153,7 +153,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - added BibSonomy plugin ([#6143]({{ site.repository }}/issues/6143))
 - add plugins for multiple page pagination ([#6055]({{ site.repository }}/issues/6055))
 - Update minimum Ruby version in installation.md ([#6164]({{ site.repository }}/issues/6164))
-- [docs] Add information about finding a collection in `site.collections` ([#6165]({{ site.repository }}/issues/6165))
+- Add information about finding a collection in `site.collections` ([#6165]({{ site.repository }}/issues/6165))
 - Add {% raw %}`{% raw %}`{% endraw %} to Liquid example on site ([#6179]({{ site.repository }}/issues/6179))
 - Added improved Pug plugin - removed 404 Jade plugin ([#6174]({{ site.repository }}/issues/6174))
 - Linking the link ([#6210]({{ site.repository }}/issues/6210))
@@ -263,7 +263,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 ### Development Fixes
 {: #development-fixes-v3-5-0}
-- [Rubocop] add missing comma ([#5835]({{ site.repository }}/issues/5835))
+- Rubocop: add missing comma ([#5835]({{ site.repository }}/issues/5835))
 - Appease classifier-reborn ([#5934]({{ site.repository }}/issues/5934))
 - Allow releases & development on `*-stable` branches ([#5926]({{ site.repository }}/issues/5926))
 - Add script/backport-pr ([#5925]({{ site.repository }}/issues/5925))
@@ -302,7 +302,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 {: #bug-fixes-v3-5-0}
 - Exclude Gemfile by default ([#5860]({{ site.repository }}/issues/5860))
-- Convertible#validate_permalink!: ensure the return value of data["permalink"] is a string before asking if it is empty ([#5878]({{ site.repository }}/issues/5878))
+- Convertible#validate_permalink!: ensure the return value of `data["permalink"]` is a string before asking if it is empty ([#5878]({{ site.repository }}/issues/5878))
 - Allow abbreviated post dates ([#5920]({{ site.repository }}/issues/5920))
 - Remove dependency on include from default about.md ([#5903]({{ site.repository }}/issues/5903))
 - Allow colons in `uri_escape` filter ([#5957]({{ site.repository }}/issues/5957))
@@ -378,7 +378,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Switch to `https` when possible. ([#5611]({{ site.repository }}/issues/5611))
 - Update `_font-awesome.scss` to move .woff file before .ttf ([#5614]({{ site.repository }}/issues/5614))
 - Update documentation on updating FontAwesome Iconset ([#5655]({{ site.repository }}/issues/5655))
-- [site] Use defaults for docs and news-items ([#5744]({{ site.repository }}/issues/5744))
+- Use defaults for docs and news-items ([#5744]({{ site.repository }}/issues/5744))
 - Sort gems in `docs/_config.yml` ([#5746]({{ site.repository }}/issues/5746))
 - Add missing class ([#5791]({{ site.repository }}/issues/5791))
 - Improve template docs ([#5694]({{ site.repository }}/issues/5694))
@@ -440,7 +440,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Update quickstart.md ([#5758]({{ site.repository }}/issues/5758))
 - Correct minor typo ([#5764]({{ site.repository }}/issues/5764))
 - Fix a markdown link to look properly on the web ([#5769]({{ site.repository }}/issues/5769))
-- [docs] Info about the help command usage ([#5312]({{ site.repository }}/issues/5312))
+- Info about the help command usage ([#5312]({{ site.repository }}/issues/5312))
 - Add missing merge labels for jekyllbot ([#5753]({{ site.repository }}/issues/5753))
 - Fix broken links in documentation ([#5736]({{ site.repository }}/issues/5736))
 - Docs: add `match_regex` and `replace_regex` filters ([#5799]({{ site.repository }}/issues/5799))
@@ -583,10 +583,10 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Site: exclude README.md and .gitignore ([#5304]({{ site.repository }}/issues/5304))
 - Add link to Staticman ([#5224]({{ site.repository }}/issues/5224))
 - Update url for OpenShift ([#5320]({{ site.repository }}/issues/5320))
-- [docs] add help for missing static_file e.g. on heroku ([#5334]({{ site.repository }}/issues/5334))
+- Add help for missing static_file e.g. on heroku ([#5334]({{ site.repository }}/issues/5334))
 - Add a line about updating theme-gems in the docs ([#5318]({{ site.repository }}/issues/5318))
 - Explain how to copy a theme's files ([#5335]({{ site.repository }}/issues/5335))
-- [docs] .md as default extension in examples ([#5316]({{ site.repository }}/issues/5316))
+- .md as default extension in examples ([#5316]({{ site.repository }}/issues/5316))
 - Fix small typo in docs ([#5347]({{ site.repository }}/issues/5347))
 - Add missing period to sentence in first paragraph. ([#5372]({{ site.repository }}/issues/5372))
 - added jekyll-spotify plugin ([#5369]({{ site.repository }}/issues/5369))
@@ -595,7 +595,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Add documentation for `relative_url` and `absolute_url` ([#5405]({{ site.repository }}/issues/5405))
 - Bugfix on logo in JSON-LD ([#5421]({{ site.repository }}/issues/5421))
 - Fix Travis.ci documentation ([#5413]({{ site.repository }}/issues/5413))
-- [docs] Update documentation regarding `bundle install` after `jekyll new` ([#5428]({{ site.repository }}/issues/5428))
+- Update documentation regarding `bundle install` after `jekyll new` ([#5428]({{ site.repository }}/issues/5428))
 - Replace classic box-sizing reset with inheritance reset ([#5411]({{ site.repository }}/issues/5411))
 - Update Wikipedia YAML list link ([#5452]({{ site.repository }}/issues/5452))
 - Add Jekyll 3.3 release post ([#5442]({{ site.repository }}/issues/5442))
@@ -929,7 +929,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Fix broken links to the Code of Conduct ([#4436]({{ site.repository }}/issues/4436))
 - Upgrade notes: mention trailing slash in permalink; fixes [#4440]({{ site.repository }}/issues/4440) ([#4455]({{ site.repository }}/issues/4455))
 - Add hooks to the plugin categories toc ([#4463]({{ site.repository }}/issues/4463))
-- [add note] Jekyll 3 requires newer version of Ruby. ([#4461]({{ site.repository }}/issues/4461))
+- Jekyll 3 requires newer version of Ruby. ([#4461]({{ site.repository }}/issues/4461))
 - Fix typo in upgrading docs ([#4473]({{ site.repository }}/issues/4473))
 - Add note about upgrading documentation on jekyllrb.com/help/ ([#4484]({{ site.repository }}/issues/4484))
 - Update Rake link ([#4496]({{ site.repository }}/issues/4496))
@@ -1005,7 +1005,7 @@ note: This file is autogenerated. Edit /History.markdown instead.
 - Fix deep_merge_hashes! handling of drops and hashes ([#4359]({{ site.repository }}/issues/4359))
 - Page should respect output extension of its permalink ([#4373]({{ site.repository }}/issues/4373))
 - Disable auto-regeneration when running server detached ([#4376]({{ site.repository }}/issues/4376))
-- Drop#[]: only use public_send for keys in the content_methods array ([#4388]({{ site.repository }}/issues/4388))
+- Drop#: only use public_send for keys in the content_methods array ([#4388]({{ site.repository }}/issues/4388))
 - Extract title from filename successfully when no date. ([#4195]({{ site.repository }}/issues/4195))
 ### Development Fixes