Suggestion: syntax for non-standard string literals

One could define a function to operate on a single string like so:

``` r
`g"` <- function(x) {
glue::glue(x, .envir = parent.frame())
}
```

This would basically give you something very similar to Python's f-strings:

``` r
g"1 + 1 = {1 + 1}"
#> [1] "1 + 1 = 2"
```

Obviously, the {glue} package isn't available in this version of R, but you get the idea 😄

This idea comes from Julia, which lets you define non-standard string literals in the same way: .