Unable to build

[mscdex]

When trying to build this as per the readme's instructions, I get:

mscdex@server:~/iriscouch-bigdecimal.js-5ee98b5$ rake
RoundingMode.java.erb => RoundingMode.java
MathContext.java.erb => MathContext.java
BigInteger.java.erb => BigInteger.java
rake aborted!
compile error
(erb):38: syntax error, unexpected ')'
    ).to_s); _erbout.concat "\n    ...
     ^

Tasks: TOP => default => bigdecimal => /home/mscdex/iriscouch-bigdecimal.js-5ee98b5/lib/bigdecimal.js => /home/mscdex/iriscouch-bigdecimal.js-5ee98b5/build/out.js => /home/mscdex/iriscouch-bigdecimal.js-5ee98b5/BigDecimalApp/src/com/iriscouch/gwtapp/client/BigDecimal.java
(See full trace by running task with --trace)

Any ideas?