Suggestion for Upgrading

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Upgrade warnings indicate features that have changed in a later version.

namespace foo {
    variable bar 0
}

When [incr Tcl] was upgraded to 3.0, it inherited the Tcl namespace command. The syntax of defining a namespace has changed from older versions of [incr Tcl] because of this. With earlier versions of [incr Tcl], correct usage was:

namespace foo {body}

With [incr Tcl] 3.0 and later, correct usage is shown below:

namespace eval foo {body}

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