update CHANGELOG

CHANGELOG.md

@@ -30,6 +30,8 @@ Categories Used:
 
 ### Improvements
 
+- Make `--format` more forgiving with the formatting of the provided format [\#519](https://github.com/ouch-org/ouch/pull/519) ([marcospb19](https://github.com/marcospb19))
+
 ## [0.5.1](https://github.com/ouch-org/ouch/compare/0.5.0...0.5.1)
 
 ### Improvements

tests/snapshots/ui__ui_test_err_format_flag-3.snap

@@ -5,11 +5,10 @@ expression: "run_ouch(\"ouch compress input output --format .tar.$#[email protected]\", di
 [ERROR] Failed to parse `--format .tar.$#[email protected]`
  - Unsupported extension '$#!@'
 
-hint: Supported extensions are: tar, zip, bz, bz2, gz, lz4, xz, lzma, sz, zst
+hint: Supported extensions are: tar, zip, bz, bz2, gz, lz4, xz, lzma, sz, zst, rar, 7z
 hint: Supported aliases are: tgz, tbz, tlz4, txz, tzlma, tsz, tzst
 hint: 
 hint: Examples:
 hint:   --format tar
 hint:   --format gz
 hint:   --format tar.gz
-