Replace "var" with instance type in generated instantiations

[arnab-sen]

Current behaviour:

A generated instantiation line has the following format:
var <name> = new <type>(<constructor args>) {<object initialisation>}; /* <metadata> */

Desired behaviour:

A generated instantiation line should have the following format:
<type> <name> = new <type>(<constructor args>) {<object initialisation>}; /* <metadata> */

Comments:

This is apparently required for automated testing. This is a relatively unobtrusive decorative change, although it will cause misalignment between lines with identical variable name lengths.

[arnab-sen]

Added in v1.7.0.