Using constants as keys confuses formatting.

When a constant is used as a key, the plugin's indentation logic gets confused:

page {
    10 {
        {$backendLayoutUID.oneColumn} < lib.fluidTemplate.stdTemplate
        {$backendLayoutUID.oneColumn} {
            ... # <--
        } # <--
    } # <--
}

Newlines at the marked positions won't result in a proper indentation in the new line.