Chore: Make <details> be displayed correctly

An issue within the `html` regex in the markdown parser `marked`
(see: markedjs/marked#1032) makes the current
code not be correctly parsed for the site.

Adding blank lines between the comments and the HTML code temporarily
fixed the issues.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Ref webhintio/webhintio.github.io#364
Fix webhintio/webhintio.github.io#364

Close #771

Author: qzhou1607-zz

docs/user-guide/rules/content-type.md

@@ -109,6 +109,7 @@ Content-Type: text/javascript; charset=utf-8
 ## How to configure the server to pass this rule
 
 <!-- markdownlint-disable MD033 -->
+
 <details>
 <summary>How to configure Apache</summary>
 
@@ -284,6 +285,7 @@ Note that:
   file in the root of the web site/app.
 
 </details>
+
 <!-- markdownlint-enable MD033 -->
 
 ## Can the rule be configured?

docs/user-guide/rules/highest-available-document-mode.md

@@ -219,6 +219,7 @@ X-UA-Compatible: ie=edge
 ## How to configure the server to pass this rule
 
 <!-- markdownlint-disable MD033 -->
+
 <details>
 <summary>How to configure Apache</summary>
 
@@ -281,6 +282,7 @@ Note that:
   file in the root of the web site/app.
 
 </details>
+
 <!-- markdownlint-enable MD033 -->
 
 ## Can the rule be configured?

docs/user-guide/rules/http-cache.md

@@ -153,6 +153,7 @@ Cache-Control: no-cache
 ## How to configure the server to pass this rule
 
 <!-- markdownlint-disable MD033 -->
+
 <details>
 <summary>How to configure Apache</summary>
 
@@ -277,6 +278,7 @@ Also note that:
   file in the root of the web site/app.
 
 </details>
+
 <!-- markdownlint-enable MD033 -->
 
 ## Can the rule be configured?

docs/user-guide/rules/http-compression.md

@@ -518,6 +518,7 @@ Content-Type: image/svg+xml
 ## How to configure the server to pass this rule
 
 <!-- markdownlint-disable MD033 -->
+
 <details>
 <summary>How to configure Apache</summary>
 
@@ -793,6 +794,7 @@ Also note that:
   file in the root of the web site/app.
 
 </details>
+
 <!-- markdownlint-enable MD033 -->
 
 ## Can the rule be configured?

docs/user-guide/rules/no-disallowed-headers.md

@@ -81,6 +81,7 @@ HTTP/... 200 OK
 ## How to configure the server to pass this rule
 
 <!-- markdownlint-disable MD033 -->
+
 <details>
 <summary>How to configure Apache</summary>
 
@@ -141,6 +142,7 @@ Note that:
   `.htaccess` file in the root of the web site/app.
 
 </details>
+
 <!-- markdownlint-enable MD033 -->
 
 ## Can the rule be configured?

docs/user-guide/rules/no-html-only-headers.md

@@ -85,6 +85,7 @@ X-XSS-Protection: 1; mode=block
 ## How to configure the server to pass this rule
 
 <!-- markdownlint-disable MD033 -->
+
 <details>
 <summary>How to configure Apache</summary>
 
@@ -128,6 +129,7 @@ Note that:
   file in the root of the web site/app.
 
 </details>
+
 <!-- markdownlint-enable MD033 -->
 
 ## Can the rule be configured?

docs/user-guide/rules/strict-transport-security.md

@@ -118,6 +118,7 @@ HTTP/... 200 OK
 ## How to configure the server to pass this rule
 
 <!-- markdownlint-disable MD033 -->
+
 <details>
 <summary>How to configure Apache</summary>
 
@@ -148,6 +149,7 @@ Note that:
   file in the root of the web site/app.
 
 </details>
+
 <!-- markdownlint-enable MD033 -->
 
 ## Can the rule be configured?

docs/user-guide/rules/x-content-type-options.md

@@ -66,6 +66,7 @@ X-Content-Type-Options: nosniff
 ## How to configure the server to pass this rule
 
 <!-- markdownlint-disable MD033 -->
+
 <details>
 <summary>How to configure Apache</summary>
 
@@ -96,6 +97,7 @@ Note that:
   file in the root of the web site/app.
 
 </details>
+
 <!-- markdownlint-enable MD033 -->
 
 ## Further Reading