fix: minor issues

https://github.com/plantuml/plantuml/issues/1367
https://github.com/plantuml/plantuml/issues/1389

src/net/sourceforge/plantuml/ErrorStatus.java

@@ -51,7 +51,6 @@ public class ErrorStatus {
 
 	// public synchronized void goNoData() {
 	// this.noData = true;
-	//
 	// }
 
 	public synchronized void goWithError() {

src/net/sourceforge/plantuml/klimt/color/HColorGradient.java

@@ -95,4 +95,9 @@ public class HColorGradient extends HColor {
 		return color1.toColor(mapper);
 	}
 
+	@Override
+	public HColor opposite() {
+		return color1.opposite();
+	}
+
 }

src/net/sourceforge/plantuml/project/GanttDiagram.java

@@ -674,6 +674,11 @@ public class GanttDiagram extends TitledDiagram implements ToTaskDraw, WithSprit
 		return openClose.getStartingDay();
 	}
 
+	public Day getEndingDate() {
+		initMinMax();
+		return max;
+	}
+
 	public int daysInWeek() {
 		return openClose.daysInWeek();
 	}
@@ -772,6 +777,13 @@ public class GanttDiagram extends TitledDiagram implements ToTaskDraw, WithSprit
 		nameDays.put(day, name);
 	}
 
+	public Day getToday() {
+		if (today == null)
+			this.today = Day.today();
+
+		return today;
+	}
+
 	public void setTodayColors(CenterBorderColor colors) {
 		if (today == null)
 			this.today = Day.today();

src/net/sourceforge/plantuml/project/draw/TimeHeaderCalendar.java

@@ -111,6 +111,10 @@ public abstract class TimeHeaderCalendar extends TimeHeader {
 
 			}
 		}
+
+		if (pending != null)
+			pending.draw(ug, height);
+
 	}
 
 }

src/net/sourceforge/plantuml/project/lang/SubjectDayAsDate.java

@@ -75,8 +75,18 @@ public class SubjectDayAsDate implements Subject {
 	}
 
 	private Day resultE(GanttDiagram system, RegexResult arg) {
-		final int day = Integer.parseInt(arg.get("ECOUNT", 0));
-		return system.getStartingDate().addDays(day);
+		final String type = arg.get("ETYPE", 0).toUpperCase();
+		final String operation = arg.get("EOPERATION", 0);
+		int day = Integer.parseInt(arg.get("ECOUNT", 0));
+		if ("-".equals(operation))
+			day = -day;
+		if ("D".equals(type))
+			return system.getStartingDate().addDays(day);
+		if ("T".equals(type))
+			return system.getToday().addDays(day);
+		if ("E".equals(type))
+			return system.getEndingDate().addDays(day);
+		throw new IllegalStateException();
 	}
 
 	public Collection<? extends SentenceSimple> getSentences() {
@@ -138,7 +148,8 @@ public class SubjectDayAsDate implements Subject {
 
 	private IRegex toRegexE() {
 		return new RegexConcat( //
-				new RegexLeaf("[dD]\\+"), //
+				new RegexLeaf("ETYPE", "([dDtTeE])"), //
+				new RegexLeaf("EOPERATION", "([-+])"), //
 				new RegexLeaf("ECOUNT", "([\\d]+)") //
 		);
 	}

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

@@ -82,7 +82,7 @@ public class Version {
 	}
 
 	public static int beta() {
-		final int beta = 3;
+		final int beta = 4;
 		return beta;
 	}