fix code blocks formatting mistakes.

docs/modules/ROOT/pages/servlet/architecture.adoc

@@ -174,8 +174,10 @@ However, there are times that it is beneficial to know the ordering, if you want
 
 To exemplify the above paragraph, let's consider the following security configuration:
 
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-.Java
+[tabs]
+======
+Java::
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 [source,java,role="primary"]
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 @Configuration
@@ -196,7 +198,9 @@ public class SecurityConfig {
 
 }
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-.Kotlin
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+Kotlin::
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 [source,kotlin,role="secondary"]
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 import org.springframework.security.config.web.servlet.invoke
@@ -220,7 +224,7 @@ class SecurityConfig {
 
 }
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-====
+======
 
 The above configuration will result in the following `Filter` ordering:
 
@@ -336,8 +340,9 @@ Instead of implementing `Filter`, you can extend from {spring-framework-api-url}
 
 Now, we need to add the filter to the security filter chain.
 
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+Java::
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 [source,java,role="primary"]
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 @Bean
@@ -348,7 +353,9 @@ SecurityFilterChain filterChain(HttpSecurity http) throws Exception {
     return http.build();
 }
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-.Kotlin
+
+Kotlin::
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 [source,kotlin,role="secondary"]
 ----
 @Bean
@@ -359,7 +366,7 @@ fun filterChain(http: HttpSecurity): SecurityFilterChain {
     return http.build()
 }
 ----
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+======
 
 <1> Use `HttpSecurity#addFilterBefore` to add the `TenantFilter` before the `AuthorizationFilter`.
 

docs/modules/ROOT/pages/servlet/authentication/architecture.adoc

@@ -31,7 +31,7 @@ If it contains a value, it is used as the currently authenticated user.
 The simplest way to indicate a user is authenticated is to set the `SecurityContextHolder` directly:
 
 .Setting `SecurityContextHolder`
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 [tabs]
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 Java::
@@ -66,7 +66,7 @@ Here, we use `TestingAuthenticationToken`, because it is very simple.
 A more common production scenario is `UsernamePasswordAuthenticationToken(userDetails, password, authorities)`.
 <3> Finally, we set the `SecurityContext` on the `SecurityContextHolder`.
 Spring Security uses this information for xref:servlet/authorization/index.adoc#servlet-authorization[authorization].
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+
 
 To obtain information about the authenticated principal, access the `SecurityContextHolder`.