Chomp trailing newline in shortcodes.

layouts/_shortcodes/button.html

@@ -3,3 +3,4 @@
 {{ $src := .Get "src" -}}
 {{ $text := .Get "text" -}}
 <a class="button{{ with $class }} {{ . }}{{ end }}" href="{{ $src }}"{{ if $newtab }} target="_blank" rel="noopener noreferrer"{{ end }}>{{ $text }}</a>
+{{- /* chomp trailing newline */ -}}

layouts/_shortcodes/file.html

@@ -34,3 +34,4 @@
 {{ end -}}
 
 <a class="file{{ with $class }} {{ . }}{{ end }}" href="{{ $src }}"{{ if $newtab }} target="_blank" rel="noopener noreferrer"{{ end }}>{{ $text }}</a>
+{{- /* chomp trailing newline */ -}}

layouts/_shortcodes/img.html

@@ -91,4 +91,4 @@
 
 {{ with $link }}<a class="image-link" href="{{ . }}">{{ end -}}
 <img class="image{{ with $class }} {{ . }}{{ end }}" src="{{ $src }}" loading="lazy"{{ with $srcsetw }} srcset="{{ delimit  .  ", " }}"{{ end }}{{ if isset .Params "alt" }} alt="{{ $alt }}"{{ end }}{{ with $width }} width="{{ . }}"{{ end }}{{ with $height }} height="{{ . }}"{{ end }}>
-{{- if $link }}</a>{{ end }}
+{{- if $link }}</a>{{ end -}}

layouts/_shortcodes/math.html

@@ -1 +1,2 @@
 ${{ .Inner }}$
+{{- /* chomp trailing newline */ -}}

layouts/_shortcodes/reflink.html

@@ -1 +1 @@
-{{ with site.GetPage (.Get 0) }}<a href="{{ .RelPermalink }}">{{ .Title }}</a>{{ end }}
+{{ with site.GetPage (.Get 0) }}<a href="{{ .RelPermalink }}">{{ .Title }}</a>{{ end -}}