Use nu-ansi-term instead of ansi_term

The `nu-ansi-term` crate is a fork of `ansi_term` which is maintained by
the Nushell project.

Cargo.toml

@@ -42,7 +42,7 @@ regex-fancy = ["syntect/regex-fancy"] # Use the rust-only "fancy-regex" engine
 
 [dependencies]
 atty = { version = "0.2.14", optional = true }
-ansi_term = "^0.12.1"
+ansi_term = { version = "0.47", package = "nu-ansi-term" }
 ansi_colours = "^1.2"
 bincode = "1.0"
 console = "0.15.5"

src/bin/bat/main.rs

@@ -14,7 +14,7 @@ use std::io::{BufReader, Write};
 use std::path::Path;
 use std::process;
 
-use ansi_term::Colour::Green;
+use ansi_term::Color::Green;
 use ansi_term::Style;
 
 use crate::{

src/error.rs

@@ -43,7 +43,7 @@ impl From<String> for Error {
 pub type Result<T> = std::result::Result<T, Error>;
 
 pub fn default_error_handler(error: &Error, output: &mut dyn Write) {
-    use ansi_term::Colour::Red;
+    use ansi_term::Color::Red;
 
     match error {
         Error::Io(ref io_error) if io_error.kind() == ::std::io::ErrorKind::BrokenPipe => {

src/macros.rs

@@ -1,7 +1,7 @@
 #[macro_export]
 macro_rules! bat_warning {
     ($($arg:tt)*) => ({
-        use ansi_term::Colour::Yellow;
+        use ansi_term::Color::Yellow;
         eprintln!("{}: {}", Yellow.paint("[bat warning]"), format!($($arg)*));
     })
 }

src/printer.rs

@@ -1,7 +1,7 @@
 use std::io::Write;
 use std::vec::Vec;
 
-use ansi_term::Colour::{Fixed, Green, Red, Yellow};
+use ansi_term::Color::{Fixed, Green, Red, Yellow};
 use ansi_term::Style;
 
 use bytesize::ByteSize;

src/terminal.rs

@@ -1,4 +1,4 @@
-use ansi_term::Color::{self, Fixed, RGB};
+use ansi_term::Color::{self, Fixed, Rgb};
 use ansi_term::{self, Style};
 
 use syntect::highlighting::{self, FontStyle};
@@ -38,7 +38,7 @@ pub fn to_ansi_color(color: highlighting::Color, true_color: bool) -> Option<ans
         // 01. The built-in theme ansi uses this.
         None
     } else if true_color {
-        Some(RGB(color.r, color.g, color.b))
+        Some(Rgb(color.r, color.g, color.b))
     } else {
         Some(Fixed(ansi_colours::ansi256_from_rgb((
             color.r, color.g, color.b,