[BUG]: contour.showlegend default differs from actual behavior

Description

The contour.showlegend reference documents the default as true.

However, for contours with coloring !== 'none', the actual default is explicitly set to false in:

plotly.js/src/traces/contour/style_defaults.js

Lines 20 to 29 in 4862f62

    
           if(coloring !== 'none') { 
        
               // plots/plots always coerces showlegend to true, but in this case 
        
               // we default to false and (by default) show a colorbar instead 
        
               if(traceIn.showlegend !== true) traceOut.showlegend = false; 
        
               traceOut._dfltShowLegend = false; 
        
               colorscaleDefaults( 
        
                   traceIn, traceOut, layout, coerce, {prefix: '', cLetter: 'z'} 
        
               ); 
        
           }

So the documented default does not match the actual behavior. Or this is confusing.

Screenshot

Codepen

https://codepen.io/Lexachoc/pen/WbpdLjQ

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[BUG]: `contour.showlegend` default differs from actual behavior #8111

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	if(coloring !== 'none') {
	// plots/plots always coerces showlegend to true, but in this case
	// we default to false and (by default) show a colorbar instead
	if(traceIn.showlegend !== true) traceOut.showlegend = false;
	traceOut._dfltShowLegend = false;

	colorscaleDefaults(
	traceIn, traceOut, layout, coerce, {prefix: '', cLetter: 'z'}
	);
	}

[BUG]: contour.showlegend default differs from actual behavior #8111

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[BUG]: `contour.showlegend` default differs from actual behavior #8111