Support attribute bindings within a TEXT expression

[sdlime]

In 5.6 you'd do something like:

TEXT (area is [area])

and with the expression changes in RFC 64 this becomes:

TEXT ("area is" + [area])

For complicated uses this can be onerous. I propose adding attribute binding (e.g. straight substitution) for a string expression, e.g.:

TEXT "area is [area]"

This will make upgrading to 6.0 easier for folks. We'll still reserve the () syntax for true text expressions.

Steve

[sdlime]

Added in r11160. Note that with this change you can't do something like:

TEXT 'hello [world]'

where [world] is not a reference to an attribute. As a workaround one could do:

TEXT ("hello [" + "world]")

Steve

[sdlime]

Updated migration guide in r11161. Closing... Steve