Revert "Remove code that tries to handle ANSI escape inputs"

This reverts commit 8174e02279. Turns out
it is needed for a common use case, see
https://github.com/sharkdp/bat/issues/2307.

It is not a clean revert, because I adjust CHANGELOG.md and also add a
comment to the test. I also had to resolve a small `use` conflict.

src/preprocessor.rs

@@ -1,28 +1,37 @@
 use std::fmt::Write;
 
+use console::AnsiCodeIterator;
+
 /// Expand tabs like an ANSI-enabled expand(1).
-pub fn expand_tabs(mut text: &str, width: usize, cursor: &mut usize) -> String {
-    let mut buffer = String::with_capacity(text.len() * 2);
+pub fn expand_tabs(line: &str, width: usize, cursor: &mut usize) -> String {
+    let mut buffer = String::with_capacity(line.len() * 2);
 
-    while let Some(index) = text.find('\t') {
-        // Add previous text.
-        if index > 0 {
-            *cursor += index;
-            buffer.push_str(&text[0..index]);
+    for chunk in AnsiCodeIterator::new(line) {
+        match chunk {
+            (text, true) => buffer.push_str(text),
+            (mut text, false) => {
+                while let Some(index) = text.find('\t') {
+                    // Add previous text.
+                    if index > 0 {
+                        *cursor += index;
+                        buffer.push_str(&text[0..index]);
+                    }
+
+                    // Add tab.
+                    let spaces = width - (*cursor % width);
+                    *cursor += spaces;
+                    buffer.push_str(&*" ".repeat(spaces));
+
+                    // Next.
+                    text = &text[index + 1..text.len()];
+                }
+
+                *cursor += text.len();
+                buffer.push_str(text);
+            }
         }
-
-        // Add tab.
-        let spaces = width - (*cursor % width);
-        *cursor += spaces;
-        buffer.push_str(&*" ".repeat(spaces));
-
-        // Next.
-        text = &text[index + 1..text.len()];
     }
 
-    *cursor += text.len();
-    buffer.push_str(text);
-
     buffer
 }