TextBlock with multiple spacing

Question

Given a formatted text block in Windows Phone 7.1 project:

Answer 1

if you write all your Runs in the same line, the empty space will go away. Basically a new line here is one empty space on the UI.

<TextBlock Foreground="DarkGray" VerticalAlignment="Bottom" Margin="0,0,0,8"><Run Text="total length "/><Run Text="{Binding TotalHours}" FontSize="48"/><Run Text="h "/><Run Text=":" FontSize="48"/><Run Text="{Binding TotalMinutes}" FontSize="48"/><Run Text="m "/></TextBlock>

Answer 2

To build off Justin XL's answer, the important part is that you can't have whitespace between the run tags, but whitespace in the tags themselves does't matter...

So you can get creative to place runs on separate lines, but not add spaces to the result:

<!-- Formatted to prevent adding spaces between runs -->
<TextBlock Foreground="DarkGray" VerticalAlignment="Bottom" Margin="0,0,0,8"
    ><Run Text="total length "
    /><Run Text="{Binding TotalHours}" FontSize="48"
    /><Run Text="h "
    /><Run Text=":" FontSize="48"
    /><Run Text="{Binding TotalMinutes}" FontSize="48"
    /><Run Text="m "
/></TextBlock>