Support ANSI escape sequence for clearing display in preview window

  fzf --preview 'for i in $(seq 100000); do
    (( i % 200 == 0 )) && printf "\033[2J"
    echo "$i"
    sleep 0.01
  done'

1 files changed, 19 insertions, 1 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 75595df0..c11585ef 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,9 +3,27 @@ CHANGELOG
 
 0.24.0
 ------
-- fzf can render preview window before the command completes
+- Real-time rendering of preview window
   ```sh
+  # fzf can render preview window before the command completes
   fzf --preview 'sleep 1; for i in $(seq 100); do echo $i; sleep 0.01; done'
+
+  # Preview window can process ANSI escape sequence (CSI 2 J) for clearing the display
+  fzf --preview 'for i in $(seq 100000); do
+    (( i % 200 == 0 )) && printf "\033[2J"
+    echo "$i"
+    sleep 0.01
+  done'
+  ```
+- To indicate if `--multi` mode is enabled, fzf will print the number of
+  selected items even when no item is selected
+  ```sh
+  seq 100 | fzf
+    # 100/100
+  seq 100 | fzf --multi
+    # 100/100 (0)
+  seq 100 | fzf --multi 5
+    # 100/100 (0/5)
   ```
 
 0.23.1