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- Remove outdated key from search.json

_includes/no-linenos.html

@@ -1,10 +0,0 @@
-{% comment %}
-  Remove the line number of the code snippet.
-{% endcomment %}
-
-{% assign content = include.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 %}

_includes/post-description.html

@@ -8,8 +8,17 @@
 {%- if post.description -%}
   {{- post.description -}}
 {%- else -%}
-  {%- include no-linenos.html content=post.content -%}
-  {{- content | markdownify | strip_html -}}
+  {% 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 | newline_to_br | replace: '<br />', ' ' | strip_newlines -}}
 {%- endif -%}
 {%- endcapture -%}
 

_includes/search-loader.html

@@ -12,7 +12,7 @@
         {tags}
       </div>
     </header>
-    <p>{snippet}</p>
+    <p>{content}</p>
   </article>
 {% endcapture %}