Raw String Literals - Remove Leading Indentation

Question

Edit: Raw String Literals have been dropped from JDK 12, but I'm going to leave this question open and will edit it accordingly whenever Raw String Literals are reintroduced.

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When testing Raw String Literals (which are a preview feature in Java 12), I came across the following snippet of code:

System.out.println(`
        Test 1
            Test 2
                Test 3
`);

Which outputs the following:

          
        Test 1
            Test 2
                Test 3
                          

However, I want the output to resemble the following:

Test 1
    Test 2
        Test 3

What is the easiest way to remove the leading indentation to match the intended format?

Answer 1

Accompanying Raw String Literals as a preview feature in Java 12 are new methods that will be added to java.lang.String, one of which is String#align. Its documentation states the following:

Removes vertical and horizontal white space margins from around the essential body of a multi-line string, while preserving relative indentation.

...

For each non-blank line, min leading white space characters are removed. Each white space character is treated as a single character. In particular, the tab character "\t" (U+0009) is considered a single character; it is not expanded.

Leading and trailing blank lines, if any, are removed. Trailing spaces are preserved.

Each line is suffixed with a line feed character "\n" (U+000A).

To use this method, we can change the code to the following:

System.out.println(`
    Test 1
        Test 2
            Test 3
`.align());

Which outputs the following (suffixed with a line feed character, as stated by the documentation):

Test 1
    Test 2
        Test 3