BUG: Fix display of spacingString in ctkQImageView

This commit fixes a regression introduced in e6d44f8 ("BUG: Mark translatable
strings in DICOM/Widgets", 2023-03-01). It ensures the function `QString::number`
is called with the expected arguments for correct formatting of the spacing values.

Author: 0d15ea5e

Libs/Widgets/ctkQImageView.cpp

@@ -1075,9 +1075,9 @@ void ctkQImageView::update( bool zoomChanged,
           }
 
           QString spacingString = tr("Spacing = %1, %2, %3")
-            .arg(QString::number(this->xSpacing()), 'f', 3)
-            .arg(QString::number(this->ySpacing()), 'f', 3)
-            .arg(QString::number(this->sliceThickness()), 'f', 3);
+            .arg(QString::number(this->xSpacing(), 'f', 3))
+            .arg(QString::number(this->ySpacing(), 'f', 3))
+            .arg(QString::number(this->sliceThickness(), 'f', 3));
           QRectF spacingBound = painter.boundingRect( pointRect, textFlags,
             spacingString );
           QRectF spacingRect(