fix: restore correct cache behavior

https://github.com/plantuml/plantuml/issues/1368

src/net/sourceforge/plantuml/klimt/creole/Display.java

@@ -88,17 +88,17 @@ public class Display implements Iterable<CharSequence> {
 
 	public final static Display NULL = new Display(true, null, null, true, CreoleMode.FULL);
 
-//	@Override
-//	public int hashCode() {
-//		if (isNull)
-//			return 42;
-//		return displayData.hashCode();
-//	}
-//
-//	@Override
-//	public boolean equals(Object other) {
-//		return this.displayData.equals(((Display) other).displayData);
-//	}
+	@Override
+	public int hashCode() {
+		if (isNull)
+			return 42;
+		return displayData.hashCode();
+	}
+
+	@Override
+	public boolean equals(Object other) {
+		return this.displayData.equals(((Display) other).displayData);
+	}
 
 	public boolean equalsLike(Display other) {
 		if (isNull(this))

src/net/sourceforge/plantuml/security/SecurityUtils.java

@@ -210,13 +210,13 @@ public class SecurityUtils {
 	}
 
 	public static String getenv(String name) {
-		String env = System.getProperty(name);
-		if (StringUtils.isNotEmpty(env))
-			return env;
+		String result = System.getProperty(name);
+		if (StringUtils.isNotEmpty(result))
+			return result;
 
-		env = System.getenv(name);
-		if (StringUtils.isNotEmpty(env))
-			return env;
+		result = System.getenv(name);
+		if (StringUtils.isNotEmpty(result))
+			return result;
 
 		final String alternateName = name.replace(".", "_").toUpperCase();
 		return System.getenv(alternateName);
@@ -448,4 +448,4 @@ public class SecurityUtils {
 	}
 	// ::done
 
-}
+}

src/net/sourceforge/plantuml/version/Version.java

@@ -82,7 +82,7 @@ public class Version {
 	}
 
 	public static int beta() {
-		final int beta = 0;
+		final int beta = 1;
 		return beta;
 	}