fix: minor issue about Gantt D+00 syntax

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

@@ -40,10 +40,10 @@ import net.sourceforge.plantuml.project.GanttDiagram;
 import net.sourceforge.plantuml.project.Load;
 import net.sourceforge.plantuml.project.core.Task;
 
-public class SentenceLasts extends SentenceSimple {
+public class SentenceRequire extends SentenceSimple {
 
-	public SentenceLasts() {
-		super(SubjectTask.ME, Verbs.lasts, new ComplementSeveralDays());
+	public SentenceRequire() {
+		super(SubjectTask.ME, Verbs.requires, new ComplementSeveralDays());
 	}
 
 	@Override

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

@@ -0,0 +1,58 @@
+/* ========================================================================
+ * PlantUML : a free UML diagram generator
+ * ========================================================================
+ *
+ * (C) Copyright 2009-2024, Arnaud Roques
+ *
+ * Project Info:  https://plantuml.com
+ * 
+ * If you like this project or if you find it useful, you can support us at:
+ * 
+ * https://plantuml.com/patreon (only 1$ per month!)
+ * https://plantuml.com/paypal
+ * 
+ * This file is part of PlantUML.
+ *
+ * PlantUML is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * PlantUML distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
+ * USA.
+ *
+ *
+ * Original Author:  Arnaud Roques
+ * 
+ *
+ */
+package net.sourceforge.plantuml.project.lang;
+
+import net.sourceforge.plantuml.command.CommandExecutionResult;
+import net.sourceforge.plantuml.project.GanttDiagram;
+import net.sourceforge.plantuml.project.core.Task;
+import net.sourceforge.plantuml.project.time.Day;
+
+public class SentenceTaskEndsOnlyRelative extends SentenceSimple {
+
+	public SentenceTaskEndsOnlyRelative() {
+		super(SubjectTask.ME, Verbs.ends2, ComplementDate.onlyRelative());
+	}
+
+	@Override
+	public CommandExecutionResult execute(GanttDiagram project, Object subject, Object complement) {
+		final Task task = (Task) subject;
+		final Day end = (Day) complement;
+
+		task.setEnd(end);
+		return CommandExecutionResult.ok();
+	}
+
+}

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

@@ -80,12 +80,13 @@ public class SubjectTask implements Subject {
 	}
 
 	public Collection<? extends SentenceSimple> getSentences() {
-		return Arrays.asList(new SentenceLasts(), new SentenceTaskStarts(), new SentenceTaskStartsWithColor(),
+		return Arrays.asList(new SentenceRequire(), new SentenceTaskStarts(), new SentenceTaskStartsWithColor(),
 				new SentenceTaskStartsOnlyRelative(), new SentenceTaskStartsAbsolute(), new SentenceHappens(),
-				new SentenceHappensDate(), new SentenceEnds(), new SentenceTaskEndsAbsolute(), new SentenceIsColored(),
-				new SentenceIsColoredForCompletion(), new SentenceIsDeleted(), new SentenceIsForTask(),
-				new SentenceLinksTo(), new SentenceOccurs(), new SentenceDisplayOnSameRowAs(), new SentencePausesDate(),
-				new SentencePausesDates(), new SentencePausesDayOfWeek());
+				new SentenceHappensDate(), new SentenceEnds(), new SentenceTaskEndsOnlyRelative(),
+				new SentenceTaskEndsAbsolute(), new SentenceIsColored(), new SentenceIsColoredForCompletion(),
+				new SentenceIsDeleted(), new SentenceIsForTask(), new SentenceLinksTo(), new SentenceOccurs(),
+				new SentenceDisplayOnSameRowAs(), new SentencePausesDate(), new SentencePausesDates(),
+				new SentencePausesDayOfWeek());
 	}
 
 	public IRegex toRegex() {

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

@@ -108,7 +108,7 @@ public class Verbs {
 
 	public static IRegex isOrAreNamed = new RegexLeaf("(is|are)[%s]+named");
 
-	public static IRegex lasts = new RegexLeaf("(lasts|requires)");
+	public static IRegex requires = new RegexLeaf("(lasts|requires?)");
 
 	public static IRegex linksTo = new RegexLeaf("links to");