Fix javadoc errors

Author: TBlueF

src/main/java/de/bluecolored/bluemap/api/BlueMapMap.java

@@ -115,7 +115,7 @@ public interface BlueMapMap {
     boolean isFrozen();
 
     /**
-     * Returns the currently set TileFilter. The default TileFilter is equivalent to <code>t -> true</code>.
+     * Returns the currently set TileFilter. The default TileFilter is equivalent to <code>t -&gt; true</code>.
      */
     Predicate<Vector2i> getTileFilter();
 

src/main/java/de/bluecolored/bluemap/api/ContentTypeRegistry.java

@@ -110,7 +110,7 @@ public static String fromFileSuffix(String suffix) {
     }
 
     /**
-     * Registers a new file-suffix => content-type mapping to this registry.
+     * Registers a new file-suffix => content-type mapping to this registry.
      * @param fileSuffix The type-suffix of a file-name
      * @param contentType The content-type string
      */

src/main/java/de/bluecolored/bluemap/api/WebApp.java

@@ -65,7 +65,7 @@ public interface WebApp {
      * <br>
      * Example:
      * <pre>
-     * BlueMapAPI.onEnable(api -> {
+     * BlueMapAPI.onEnable(api -&gt; {
      *    api.getWebApp().registerStyle("js/my-custom-style.css");
      * });
      * </pre>
@@ -83,7 +83,7 @@ public interface WebApp {
      * <br>
      * Example:
      * <pre>
-     * BlueMapAPI.onEnable(api -> {
+     * BlueMapAPI.onEnable(api -&gt; {
      *    api.getWebApp().registerScript("js/my-custom-script.js");
      * });
      * </pre>