fix(search): avoid missing spaces between paragraphs in search results (#2199)

- Use a common post-snippet for search results to avoid line break issues
- Reduce Jekyll include files to speed up the build
- Remove outdated key from search.json

Author: cotes2020

_includes/no-linenos.html

@@ -8,7 +8,16 @@
 {%- if post.description -%}
   {{- post.description -}}
 {%- else -%}
-  {%- include no-linenos.html content=post.content -%}
+  {% comment %}
+    Remove the line number of the code snippet.
+  {% endcomment %}
+  {% assign content = post.content %}
+
+  {% if content contains '<td class="rouge-gutter gl"><pre class="lineno">' %}
+    {% assign content = content | replace: '<td class="rouge-gutter gl"><pre class="lineno">', '<!-- <td class="rouge-gutter gl"><pre class="lineno">'%}
+    {% assign content = content | replace: '</td><td class="rouge-code">', '</td> --><td class="rouge-code">' %}
+  {% endif %}
+
   {{- content | markdownify | strip_html -}}
 {%- endif -%}
 {%- endcapture -%}

_includes/post-description.html

@@ -12,7 +12,7 @@ <h2><a href="{url}">{title}</a></h2>
         {tags}
       </div>
     </header>
-    <p>{snippet}</p>
+    <p>{content}</p>
   </article>
 {% endcapture %}
 

_includes/search-loader.html

@@ -5,16 +5,16 @@ swcache: true
 
 [
   {% for post in site.posts %}
+    {%- capture description -%}
+      {% include post-description.html %}
+    {%- endcapture -%}
   {
     "title": {{ post.title | jsonify }},
     "url": {{ post.url | relative_url | jsonify }},
     "categories": {{ post.categories | join: ', ' | jsonify }},
     "tags": {{ post.tags | join: ', ' | jsonify }},
     "date": "{{ post.date }}",
-    {% include no-linenos.html content=post.content %}
-    {% assign _content = content | strip_html | strip_newlines %}
-    "snippet": {{ _content | truncate: 200 | jsonify }},
-    "content": {{ _content | jsonify }}
+    "content": "{{ description | newline_to_br | replace: '<br />', ' ' | strip_newlines }}"
   }{% unless forloop.last %},{% endunless %}
   {% endfor %}
 ]