ColumnSpacing docs incorrect

[RobWos]

Description

The docs mention that the default columnspacing of a grid is 6.

maui/src/Controls/docs/Microsoft.Maui.Controls/Grid.xml

Line 305 in f54222a

<value>The space between columns in this <see cref="T:Microsoft.Maui.Controls.Grid" /> layout. The default is 6.</value>

Meanwhile the actual default is 0, it had a default of 6 in Xamarin.

Default 0 in MAUI, the second value here is the default of the bindable property.

maui/src/Controls/src/Core/Layout/Grid.cs

Line 40 in f54222a

typeof(Grid), 0d, propertyChanged: Invalidate);

Default of 6 in Xamarin
https://github.com/xamarin/Xamarin.Forms/blob/d68e84f6ea4d1c97b63aeaa9d2780c3bee3a4f59/Xamarin.Forms.Core/Grid.cs#L23

When updating the docs maybe also update the summary as currently it differs from the RowSpacing

ColumnSpacing:

maui/src/Controls/docs/Microsoft.Maui.Controls/Grid.xml

Line 304 in f54222a

<summary>Provides the interface for the bound property that gets or sets the distance between columns in the Grid.</summary>

RowSpacing:

maui/src/Controls/docs/Microsoft.Maui.Controls/Grid.xml

Line 871 in f54222a

<summary>Gets or sets the amount of space left between rows in the Grid. This is a bindable property.</summary>