Goldmark text replacer extension.
md := goldmark.New(
replacer.Options(
"(c)", "©",
"(r)", "®",
"...", "…",
"(tm)", "™",
"<-", "←",
"->", "→",
"<->", "↔",
),
)
var source = []byte("(c)Dmitry Sedykh")
err := md.Convert(source, os.Stdout)
if err != nil {
log.Fatal(err)
}