Invalid Homebrew formula

[robinjoseph08]

I tried to install pg_flame using the specified tap, but I got this error:

$ brew install mgartner/tap/pg_flame
==> Tapping mgartner/tap
Cloning into '/usr/local/Homebrew/Library/Taps/mgartner/homebrew-tap'...
remote: Enumerating objects: 4, done.
remote: Counting objects: 100% (4/4), done.
remote: Compressing objects: 100% (2/2), done.
remote: Total 4 (delta 0), reused 0 (delta 0), pack-reused 0
Receiving objects: 100% (4/4), done.
Error: Invalid formula: /usr/local/Homebrew/Library/Taps/mgartner/homebrew-tap/Formula/pg_flame.rb
pg_flame: wrong number of arguments (given 1, expected 0)
Error: Cannot tap mgartner/tap: invalid syntax in tap!