Use string interpolation instead of string.Format

Proprietary

Replace simple string.Format("{0}", x) calls with $"{x}".

OpenRewrite.Recipes.CSharp.CodeQuality.Simplification.UseStringInterpolation

mod run . --recipe=OpenRewrite.Recipes.CSharp.CodeQuality.Simplification.UseStringInterpolation

Install it once, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.