Don't keep adding an extra indent for each continuation line

[kwellman]

Currently, indentation occurs as follows:

var s = "This" +
    "is" +
        "some" +
            "text"

Each line gets an extra indent added.

The following makes more sense:

var s = "This" +
    "is" +
    "some" +
    "text"

This pull request fixes this. Please have a look at it.

Thanks