Don't add extra linebreak in print composer tables

Check if remaining text is short enough to go in one line. Fixes #20546

(cherry picked from commit a774499)

Author: mhugent

src/core/layout/qgslayouttable.cpp

@@ -1157,6 +1157,12 @@ QString QgsLayoutTable::wrappedText( const QString &value, double columnWidth, c
         int lastPos = remainingText.lastIndexOf( ' ' );
         while ( lastPos > -1 )
         {
+          //check if remaining text is short enough to go in one line
+          if ( !textRequiresWrapping( remainingText, columnWidth, font ) )
+          {
+            break;
+          }
+
           if ( !textRequiresWrapping( remainingText.left( lastPos ), columnWidth, font ) )
           {
             outLines << remainingText.left( lastPos );

tests/src/core/testqgslayouttable.cpp

@@ -71,6 +71,7 @@ class TestQgsLayoutTable : public QObject
     void cellStyles(); //test cell styles
     void cellStylesRender(); //test rendering cell styles
     void dataDefinedSource();
+    void wrappedText();
 
   private:
     QgsVectorLayer *mVectorLayer = nullptr;
@@ -1388,5 +1389,19 @@ void TestQgsLayoutTable::dataDefinedSource()
   QCOMPARE( table->contents().at( 0 ), QVector< QVariant >() << 1 << 2 << 3 );
 }
 
+void TestQgsLayoutTable::wrappedText()
+{
+  QgsProject p;
+  QgsLayout l( &p );
+  QgsLayoutItemAttributeTable *t = new QgsLayoutItemAttributeTable( &l );
+  t->setWrapBehavior( QgsLayoutTable::WrapText );
+
+  QFont f;
+  QString sourceText( "Lorem ipsum dolor sit amet, consectetur adipisici elit, sed eiusmod tempor incidunt ut labore et dolore magna aliqua" );
+  QString wrapText = t->wrappedText( sourceText, 100 /*columnWidth*/, f );
+  //there should be no line break before the last word (bug #20546)
+  QVERIFY( !wrapText.endsWith( "\naliqua" ) );
+}
+
 QGSTEST_MAIN( TestQgsLayoutTable )
 #include "testqgslayouttable.moc"