SCSS: String contents can be changed in nested interpolations

[lydell]

a {
  k: "#{".5"}";
}

is turned into:

a {
  k: "#{"0.5"}";
}

Playground

Expected: The inner string, ".5", should stay unchanged.

This happens because postcss-values-parser does not support interpolations in strings, so it sees the property value as the string "#{" followed by the number .5 followed by the string "}". shellscape/postcss-values-parser#37

[alexander-akait]

Also:

a {
  k: "#{".5  +  .5"}";
}

is turned into:

a {
  k: "#{"0.5 + 0.5"}";
}

Remove spaces around +, but it is not operator, it is part of string