Remove alt text requirement from img shortcode

Author: noxilixon

layouts/shortcodes/img.html

@@ -1,38 +1,29 @@
-<!--
-    Image template - Renders a full html figure.
-    Everything could be set with named variables.
-    Only src and alt are required.
--->
-{{ if .Get "alt" }}
-    <figure{{ with .Get "class" }} class="{{ . }}"{{ end }}>
-        {{- if .Get "link" -}}
-            <a href="{{ .Get "link" }}"{{ with .Get "target" }} target="{{ . }}"{{ end }}{{ with .Get "rel" }} rel="{{ . }}"{{ end }}>
+<figure{{ with .Get "class" }} class="{{ . }}"{{ end }}>
+    {{- if .Get "link" -}}
+        <a href="{{ .Get "link" }}"{{ with .Get "target" }} target="{{ . }}"{{ end }}{{ with .Get "rel" }} rel="{{ . }}"{{ end }}>
+    {{- end -}}
+    <img src="{{ .Get "src" | relURL }}"
+        {{- if or (.Get "alt") (.Get "caption") }}
+        alt="{{ with .Get "alt" }}{{ . }}{{ else }}{{ .Get "caption" | markdownify| plainify }}{{ end }}"
         {{- end -}}
-        <img src="{{ .Get "src" | relURL }}"
-            {{- if or (.Get "alt") (.Get "caption") }}
-            alt="{{ with .Get "alt" }}{{ . }}{{ else }}{{ .Get "caption" | markdownify| plainify }}{{ end }}"
+        {{- with .Get "width" }} width="{{ . }}"{{ end -}}
+        {{- with .Get "height" }} height="{{ . }}"{{ end -}}
+        {{- with .Get "loading" }} loading="{{ . }}"{{ end -}}
+    /><!-- Closing img tag -->
+    {{- if .Get "link" }}</a>{{ end -}}
+    {{- if or (or (.Get "title") (.Get "caption")) (.Get "attr") -}}
+        <figcaption>
+            {{ with (.Get "title") -}}
+                <h4>{{ . }}</h4>
             {{- end -}}
-            {{- with .Get "width" }} width="{{ . }}"{{ end -}}
-            {{- with .Get "height" }} height="{{ . }}"{{ end -}}
-            {{- with .Get "loading" }} loading="{{ . }}"{{ end -}}
-        /><!-- Closing img tag -->
-        {{- if .Get "link" }}</a>{{ end -}}
-        {{- if or (or (.Get "title") (.Get "caption")) (.Get "attr") -}}
-            <figcaption>
-                {{ with (.Get "title") -}}
-                    <h4>{{ . }}</h4>
+            {{- if or (.Get "caption") (.Get "attr") -}}<p>
+                {{- .Get "caption" | markdownify -}}
+                {{- with .Get "attrlink" }}
+                    <a href="{{ . }}">
                 {{- end -}}
-                {{- if or (.Get "caption") (.Get "attr") -}}<p>
-                    {{- .Get "caption" | markdownify -}}
-                    {{- with .Get "attrlink" }}
-                        <a href="{{ . }}">
-                    {{- end -}}
-                    {{- .Get "attr" | markdownify -}}
-                    {{- if .Get "attrlink" }}</a>{{ end }}</p>
-                {{- end }}
-            </figcaption>
-        {{- end }}
-    </figure>
-{{ else }}
-  {{ print "Alt text missing!" }}
-{{ end }}
+                {{- .Get "attr" | markdownify -}}
+                {{- if .Get "attrlink" }}</a>{{ end }}</p>
+            {{- end }}
+        </figcaption>
+    {{- end }}
+</figure>