Bug 212371 [Regression] Auto-scale does not work correctly and gridline is not shown anymore when run the attached java file [13]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/computation/withaxes/AutoScale.java
if ( fs == null )
				{
					df = computeDecimalFormat( dAxisValue, dAxisStep );
				}
				for ( int i = 0; i < da.size( ); i++ )
				{
					nde.setValue( dAxisValue );
					try
					{
						sText = ValueFormatter.format( nde,
								fs,
								rtc.getULocale( ),
								df );
					}
					catch ( ChartException dfex )
					{
						logger.log( dfex );
						sText = IConstants.NULL_STRING;
					}
					la.getCaption( ).setValue( sText );
					if ( !baTickLabelStaggered[i] )
					{
						dW = computeWidth( xs, la );
						if ( dW > dMaxW )
						{
							dMaxW = dW;
						}
					}
					dAxisValue += dAxisStep;
				}