Make some fixes to broken visuals

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

layouts/shortcodes/sidenote.html

@@ -1,5 +1,6 @@
 <span class="sidenote">
 <label class="sidenote-label" for="{{- .Get 1 -}}">{{- .Get 2 | markdownify -}}</label>
+{{- /* chomp trailing whitespace */ -}}
 <input class="sidenote-checkbox" style="display: none;" type="checkbox" id="{{- .Get 1 -}}"></input>
 {{- if $offset := .Get 3 -}}
 <span class="sidenote-content sidenote-{{- .Get 0 -}}" style="margin-top: {{- $offset -}}rem">
@@ -10,4 +11,6 @@
 {{- .Inner -}}
 <span class="sidenote-delimiter">]</span>
 </span>
+{{- /* chomp trailing whitespace */ -}}
 </span>
+{{- /* chomp trailing whitespace */ -}}