fix: minor bug fix

https://github.com/plantuml/plantuml/issues/1422

src/net/sourceforge/plantuml/activitydiagram3/command/CommandActivity3.java

@@ -61,7 +61,7 @@ public class CommandActivity3 extends SingleLineCommand2<ActivityDiagram3> {
 
 	public static final String endingGroup() {
 		return "(" //
-				+ ";(?:[%s]*\\<\\<\\w+\\>\\>)?" //
+				+ ";(?:[%s]*(\\<\\<\\w+\\>\\>))?" //
 				+ "|" //
 				+ Matcher.quoteReplacement("\\\\") // that is simply \ character
 				+ "|" //
@@ -77,7 +77,7 @@ public class CommandActivity3 extends SingleLineCommand2<ActivityDiagram3> {
 
 	private static final String endingGroupShort() {
 		return "(" //
-				+ ";(?:[%s]*\\<\\<\\w+\\>\\>)?" //
+				+ ";(?:[%s]*(\\<\\<\\w+\\>\\>))?" //
 				+ "|" //
 				+ Matcher.quoteReplacement("\\\\") // that is simply \ character
 				+ "|" //
@@ -130,13 +130,19 @@ public class CommandActivity3 extends SingleLineCommand2<ActivityDiagram3> {
 		}
 
 		Colors colors = color().getColor(arg, diagram.getSkinParam().getIHtmlColorSet());
-		final String stereo = arg.get("STEREO", 0);
+		String stereo = arg.get("STEREO", 0);
+		if (stereo == null)
+			stereo = arg.get("STYLE", 1);
+
 		Stereotype stereotype = null;
 		if (stereo != null) {
 			stereotype = Stereotype.build(stereo);
 			colors = colors.applyStereotype(stereotype, diagram.getSkinParam(), ColorParam.activityBackground);
 		}
-		final BoxStyle style = BoxStyle.fromString(arg.get("STYLE", 0));
+		BoxStyle style = BoxStyle.fromString(arg.get("STEREO", 0));
+		if (style == BoxStyle.PLAIN)
+			style = BoxStyle.fromString(arg.get("STYLE", 0));
+
 		final Display display = Display.getWithNewlines2(arg.get("LABEL", 0));
 		return diagram.addActivity(display, style, url, colors, stereotype);
 	}

src/net/sourceforge/plantuml/activitydiagram3/ftile/BoxStyle.java

@@ -154,17 +154,18 @@ public enum BoxStyle {
 	}
 
 	public static BoxStyle fromString(String style) {
-		if (style.length() == 1)
+		if (style != null) {
+			if (style.length() == 1)
+				for (BoxStyle bs : BoxStyle.values())
+					if (bs.style == style.charAt(0))
+						return bs;
+
+			style = style.replaceAll("\\W", "");
+
 			for (BoxStyle bs : BoxStyle.values())
-				if (bs.style == style.charAt(0))
+				if (style.equalsIgnoreCase(bs.stereotype))
 					return bs;
-
-		style = style.replaceAll("\\W", "");
-
-		for (BoxStyle bs : BoxStyle.values())
-			if (style.equalsIgnoreCase(bs.stereotype))
-				return bs;
-
+		}
 		return PLAIN;
 	}
 

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

@@ -82,7 +82,7 @@ public class Version {
 	}
 
 	public static int beta() {
-		final int beta = 2;
+		final int beta = 3;
 		return beta;
 	}