Adjust pattern categories and tags

Author: iluwatar

async-method-invocation/README.md

@@ -8,6 +8,7 @@ tags:
  - Java
  - Difficulty-Intermediate
  - Functional
+ - Reactive
 ---
 
 ## Intent

command/README.md

@@ -8,6 +8,7 @@ tags:
  - Java
  - Gang Of Four
  - Difficulty-Intermediate
+ - Functional
 ---
 
 ## Also known as

event-aggregator/README.md

@@ -7,6 +7,7 @@ categories: Structural
 tags:
  - Java
  - Difficulty-Beginner
+ - Reactive
 ---
 
 ## Intent

event-driven-architecture/README.md

@@ -1,7 +1,14 @@
+---
 layout: pattern
 title: Event Driven Architecture
 folder: event-driven-architecture
 permalink: /patterns/event-driven-architecture
+categories: Architectural
+tags:
+ - Java
+ - Difficulty-Intermediate
+ - Reactive
+---
 
 ## Intent
 Send and notify state changes of your objects to other applications using an Event-driven Architecture.

monad/README.md

@@ -6,7 +6,7 @@ permalink: /patterns/monad/
 categories: Other
 tags:
  - Java
- - Difficulty-Advanced
+ - Difficulty-Expert
  - Functional
 ---
 

mute-idiom/README.md

@@ -11,7 +11,7 @@ tags:
 ---
 
 ## Intent
-Provide a template to supress any exceptions that either are declared but cannot occur or should only be logged;
+Provide a template to suppress any exceptions that either are declared but cannot occur or should only be logged;
 while executing some business logic. The template removes the need to write repeated `try-catch` blocks.
 
 
@@ -20,7 +20,7 @@ while executing some business logic. The template removes the need to write repe
 ## Applicability
 Use this idiom when
 
-* an API declares some exception but can never throw that exception. Eg. ByteArrayOutputStream bulk write method.
+* an API declares some exception but can never throw that exception eg. ByteArrayOutputStream bulk write method.
 * you need to suppress some exception just by logging it, such as closing a resource.
 
 ## Credits

mutex/README.md

@@ -3,10 +3,10 @@ layout: pattern
 title: Mutex
 folder: mutex
 permalink: /patterns/mutex/
-categories: Lock
+categories: Concurrency
 tags: 
  - Java
- - Difficulty-Beginner
+ - Difficulty-Intermediate
 ---
 
 ## Also known as

observer/README.md

@@ -8,6 +8,7 @@ tags:
  - Java
  - Difficulty-Beginner
  - Gang Of Four
+ - Reactive
 ---
 
 ## Also known as

page-object/README.md

@@ -7,9 +7,6 @@ categories: Testing
 tags:
 - Java
 - Difficulty-Intermediate
-- Testing
-- Web Development
-- Encapsulation
 ---
 
 ## Intent

poison-pill/README.md

@@ -7,6 +7,7 @@ categories: Other
 tags:
  - Java
  - Difficulty-Intermediate
+ - Reactive
 ---
 
 ## Intent