GitHub packages: versioned formulae bottle names are displayed with escape characters when pouring bottle

[max-ae]

brew config output

HOMEBREW_VERSION: 3.0.11-132-g79940b2
ORIGIN: https://github.com/Homebrew/brew
HEAD: 79940b2a273622e9540833b6bb06ecd78650bc1f
Last commit: 15 minutes ago
Core tap ORIGIN: https://github.com/Homebrew/homebrew-core
Core tap HEAD: 090d1077567a9b575e63a3d96ee077eb7dc6122f
Core tap last commit: 44 minutes ago
Core tap branch: master
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CASK_OPTS: []
HOMEBREW_DISPLAY: /private/tmp/com.apple.launchd.TVZFHl71HC/org.macosforge.xquartz:0
HOMEBREW_EDITOR: vim
HOMEBREW_MAKE_JOBS: 16
Homebrew Ruby: 2.6.3 => /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby
CPU: 16-core 64-bit kabylake
Clang: 12.0 build 1200
Git: 2.31.1 => /usr/local/bin/git
Curl: 7.64.1 => /usr/bin/curl
macOS: 11.2.3-x86_64
CLT: 12.4.0.0.1.1610135815
Xcode: 12.4
XQuartz: 2.7.11 => /opt/X11

brew doctor output

Your system is ready to brew.

The brew doctor above contains no "Warning" lines.

What were you trying to do (and why)?

Ran brew upgrade, ruby@2.6 got installed as a dependency, bottle got downloaded and poured

What happened (include all command output)?

The "pouring bottle" line displays versioned formulae bottle names with the '@' escape character '%40' if a package is downloaded from GitHub Packages. Downloading from Bintray displayed the correct bottle name with '@'

Github Packages:

==> Upgrading fastlane 2.179.0 -> 2.180.1
==> Downloading https://ghcr.io/v2/homebrew/core/ruby/2.6/manifests/2.6.6_1-1
######################################################################## 100.0%
==> Downloading https://ghcr.io/v2/homebrew/core/ruby/2.6/blobs/sha256:90a02e7c3985c005348fb1b750c22dce1ebbbd1a8854f3250da9956308c0c65f
==> Downloading from https://pkg-containers-az.githubusercontent.com/ghcr1/blobs/sha256:90a02e7c3985c005348fb1b750c22dce1ebbbd1a8854f3250da9956308c0c65f?se=2021-04-09T13%3A55%3A00Z
######################################################################## 100.0%
==> Downloading https://ghcr.io/v2/homebrew/core/fastlane/manifests/2.180.1
######################################################################## 100.0%
==> Downloading https://ghcr.io/v2/homebrew/core/fastlane/blobs/sha256:142d0d96c909b4d5e3d72a8195409237a41e09e1b160b79f2abc47f99230e635
==> Downloading from https://pkg-containers-az.githubusercontent.com/ghcr1/blobs/sha256:142d0d96c909b4d5e3d72a8195409237a41e09e1b160b79f2abc47f99230e635?se=2021-04-09T13%3A55%3A00Z
######################################################################## 100.0%
==> Installing dependencies for fastlane: ruby@2.6
==> Installing fastlane dependency: ruby@2.6
**==> Pouring ruby%402.6-2.6.6_1.big_sur.bottle.1.tar.gz**

Bintray:

❯ HOMEBREW_BOTTLE_DOMAIN=https://homebrew.bintray.com brew reinstall ruby@2.6
==> Downloading https://homebrew.bintray.com/bottles/ruby%402.6-2.6.6_1.big_sur.bottle.1.tar.gz
==> Downloading from https://d29vzk4ow07wi7.cloudfront.net/90a02e7c3985c005348fb1b750c22dce1ebbbd1a8854f3250da9956308c0c65f?response-content-disposition=attachment%3Bfilename%3D%22
######################################################################## 100.0%
==> Reinstalling ruby@2.6
**==> Pouring ruby@2.6-2.6.6_1.big_sur.bottle.1.tar.gz**

What did you expect to happen?

Bottle name to be displayed without escape characters

Step-by-step reproduction instructions (by running brew commands)

brew install ruby@2.6

HOMEBREW_BOTTLE_DOMAIN=https://homebrew.bintray.com brew reinstall ruby@2.6