Updated amount of modules, Windows command prompt and outdated hints

COMPILING.md

@@ -7,7 +7,7 @@ but it needs some version of Java to bootstrap from.
 Note that if you have JRE 16 installed, Gradle will currently attempt to use that to compile, which will not work. It is easiest to uninstall JRE 16 and
 replace it with JDK 16.
 
-The build process uses Gradle, which you do *not* need to download. WorldGuard is a multi-module project with four modules:
+The build process uses Gradle, which you do *not* need to download. WorldGuard is a multi-module project with three modules:
 
 * `worldguard-core` contains the WorldGuard API
 * `worldguard-bukkit` is the Bukkit plugin
@@ -17,7 +17,7 @@ The build process uses Gradle, which you do *not* need to download. WorldGuard i
 
 ### On Windows
 
-1. Shift + right click the folder with WorldGuard's files and click "Open command prompt".
+1. **Shift** + **right click** the folder with WorldGuard's files and click "Open PowerShell window here".
 2. `gradlew build`
 
 ### On Linux, BSD, or Mac OS X

CONTRIBUTING.md

@@ -7,9 +7,7 @@ ask that you make note of the following guidelines.
 * **Follow the [Oracle coding conventions](https://www.oracle.com/technetwork/java/javase/documentation/codeconvtoc-136057.html).**
   We can't stress this enough; if your code has notable issues, it may delay
   the process significantly.
-* **Target Java 16 for source and compilation.** Make sure to mark methods with
-  ` @Override` that override methods of parent classes, or that implement
-  methods of interfaces.
+* **Target Java 16 for source and compilation.**
 * **Use only spaces for indentation.** Our indents are 4-spaces long, and tabs
   are unacceptable.
 * **Wrap code to a 89 column limit.** We do this to make side by side diffs