+ added experiment for java.util.Formatter and String.format().

Signed-off-by: TinyCourses <tinycourses@gmail.com>
~ tweak comment.

Signed-off-by: TinyCourses <tinycourses@gmail.com>
~ tweaked IntelliJ IDEA project metadata

Signed-off-by: TinyCourses <tinycourses@gmail.com>