[bugfix] html escape special characters in text instead of totally removing them (#719)

* remove minify dependency

* tidy up some tests

* remove pre + postformat funcs

* rework sanitization + formatting

* update tests

* add some more markdown tests

vendor/github.com/tdewolff/parse/v2/buffer/writer.go

@@ -1,65 +0,0 @@
-package buffer
-
-import (
-	"io"
-)
-
-// Writer implements an io.Writer over a byte slice.
-type Writer struct {
-	buf    []byte
-	err    error
-	expand bool
-}
-
-// NewWriter returns a new Writer for a given byte slice.
-func NewWriter(buf []byte) *Writer {
-	return &Writer{
-		buf:    buf,
-		expand: true,
-	}
-}
-
-// NewStaticWriter returns a new Writer for a given byte slice. It does not reallocate and expand the byte-slice.
-func NewStaticWriter(buf []byte) *Writer {
-	return &Writer{
-		buf:    buf,
-		expand: false,
-	}
-}
-
-// Write writes bytes from the given byte slice and returns the number of bytes written and an error if occurred. When err != nil, n == 0.
-func (w *Writer) Write(b []byte) (int, error) {
-	n := len(b)
-	end := len(w.buf)
-	if end+n > cap(w.buf) {
-		if !w.expand {
-			w.err = io.EOF
-			return 0, io.EOF
-		}
-		buf := make([]byte, end, 2*cap(w.buf)+n)
-		copy(buf, w.buf)
-		w.buf = buf
-	}
-	w.buf = w.buf[:end+n]
-	return copy(w.buf[end:], b), nil
-}
-
-// Len returns the length of the underlying byte slice.
-func (w *Writer) Len() int {
-	return len(w.buf)
-}
-
-// Bytes returns the underlying byte slice.
-func (w *Writer) Bytes() []byte {
-	return w.buf
-}
-
-// Reset empties and reuses the current buffer. Subsequent writes will overwrite the buffer, so any reference to the underlying slice is invalidated after this call.
-func (w *Writer) Reset() {
-	w.buf = w.buf[:0]
-}
-
-// Close returns the last error.
-func (w *Writer) Close() error {
-	return w.err
-}