Writer fixes (#1469)

 *    - Empty newlines are removed

 */

fun <T : AbstractCodeWriter<T>> T.docs(text: String, vararg args: Any, newlinePrefix: String = "/// "): T {

    // Because writing docs relies on the newline prefix, ensure that there was a new line written

    // before we write the docs

    this.ensureNewline()

    pushState()

    setNewlinePrefix(newlinePrefix)

    val cleaned = text.lines()

            // Rustdoc warns on tabs in documentation

            it.trimStart().replace("\t", "  ")

        }

    // Because writing docs relies on the newline prefix, ensure that there was a new line written

    // before we write the docs

    this.ensureNewline()

    write(cleaned, *args)

    popState()

    return this

                Fluent builders are created through the [`Client`](crate::client::Client) by calling

                one if its operation methods. After parameters are set using the builder methods,

                the `send` method can be called to initiate the request.

                """,

                """.trim(),

                newlinePrefix = "//! "

            )

            operations.forEach { operation ->