brew install failed, invalid formula

[BeanSecurity]

± % brew install matsuyoshi30/gitsu/gitsu                                                                
Running `brew update --preinstall`...
==> Tapping matsuyoshi30/gitsu
Cloning into '/usr/local/Homebrew/Library/Taps/matsuyoshi30/homebrew-gitsu'...
remote: Enumerating objects: 18, done.
remote: Counting objects: 100% (18/18), done.
remote: Compressing objects: 100% (11/11), done.
remote: Total 18 (delta 5), reused 5 (delta 1), pack-reused 0
Receiving objects: 100% (18/18), done.
Resolving deltas: 100% (5/5), done.
Error: Invalid formula: /usr/local/Homebrew/Library/Taps/matsuyoshi30/homebrew-gitsu/gitsu.rb
gitsu: Calling bottle :unneeded is disabled! There is no replacement.
Please report this issue to the matsuyoshi30/gitsu tap (not Homebrew/brew or Homebrew/core):
  /usr/local/Homebrew/Library/Taps/matsuyoshi30/homebrew-gitsu/gitsu.rb:9

Error: Cannot tap matsuyoshi30/gitsu: invalid syntax in tap!