epoxy in R scripts
In epoxy: String Interpolation for Documents, Reports and Apps

library(epoxy)

knitr::opts_chunk$set(
    collapse = TRUE,
    comment = "#>"
)

epoxy isn't just for reports and Shiny apps! You can use the epoxy() function just like an epoxy knitr chunk.

movie <- list(
    year = 1989,
    title = "Back to the Future Part II",
    budget = 4e+07
)

epoxy(
    "The movie {.titlecase movie$title}",
    "was released in {movie$year}",
    "and was filmed with a budget of",
    "{.dollar movie$budget}.",
    .sep = "\n"
)

For HTML and LaTeX contexts, check out epoxy_html() and epoxy_latex(). These work just like epoxy(), but use convenient defaults for HTML and LaTeX settings.