warning: hidden lifetime parameters in types are deprecated

[ice1000]

warning: hidden lifetime parameters in types are deprecated
 --> /home/ubuntu/git-repos/pretty-xmlish/src/ascii.rs:4:56
  |
4 |     pub fn ascii(&mut self, out: &mut String, pretty: &Pretty) {
  |                                                        ^^^^^^ expected lifetime parameter
  |
  = note: `-W elided-lifetimes-in-paths` implied by `-W rust-2018-idioms`
help: indicate the anonymous lifetime
  |
4 |     pub fn ascii(&mut self, out: &mut String, pretty: &Pretty<'_>) {
  |                                                              ++++

warning: hidden lifetime parameters in types are deprecated
   --> /home/ubuntu/git-repos/pretty-xmlish/src/ascii.rs:102:50
    |
102 |     pub(crate) fn line_ascii(&mut self, pretty: &Pretty, self_indent_len: usize) {
    |                                                  ^^^^^^ expected lifetime parameter
    |
help: indicate the anonymous lifetime
    |
102 |     pub(crate) fn line_ascii(&mut self, pretty: &Pretty<'_>, self_indent_len: usize) {
    |                                                        ++++

warning: hidden lifetime parameters in types are deprecated
   --> /home/ubuntu/git-repos/pretty-xmlish/src/ascii.rs:135:40
    |
135 |     fn line_ascii_xml(&mut self, xml: &XmlNode, indent_len: usize, self_indent_len: usize) {
    |                                        ^^^^^^^ expected lifetime parameter
    |
help: indicate the anonymous lifetime
    |
135 |     fn line_ascii_xml(&mut self, xml: &XmlNode<'_>, indent_len: usize, self_indent_len: usize) {
    |                                               ++++

warning: hidden lifetime parameters in types are deprecated
  --> /home/ubuntu/git-repos/pretty-xmlish/src/unicode.rs:16:58
   |
16 |     pub fn unicode(&mut self, out: &mut String, pretty: &Pretty) -> usize {
   |                                                          ^^^^^^ expected lifetime parameter
   |
help: indicate the anonymous lifetime
   |
16 |     pub fn unicode(&mut self, out: &mut String, pretty: &Pretty<'_>) -> usize {
   |                                                                ++++

warning: hidden lifetime parameters in types are deprecated
   --> /home/ubuntu/git-repos/pretty-xmlish/src/unicode.rs:121:52
    |
121 |     pub(crate) fn line_unicode(&mut self, pretty: &Pretty, indent_len: usize, prefix: &str) {
    |                                                    ^^^^^^ expected lifetime parameter
    |
help: indicate the anonymous lifetime
    |
121 |     pub(crate) fn line_unicode(&mut self, pretty: &Pretty<'_>, indent_len: usize, prefix: &str) {
    |                                                          ++++

warning: hidden lifetime parameters in types are deprecated
   --> /home/ubuntu/git-repos/pretty-xmlish/src/unicode.rs:186:15
    |
186 |         xml: &XmlNode,
    |               ^^^^^^^ expected lifetime parameter
    |
help: indicate the anonymous lifetime
    |
186 |         xml: &XmlNode<'_>,
    |                      ++++