federico@korobeiniki: ~/programacion/rbx
$ ./bin/mspec ci -trbx
An exception has occurred:
    No method 'pretty_inspect' on an instance of String. (NoMethodError)

Backtrace:
    Kernel(String)#pretty_inspect (method_missing_cv) at kernel/core/kernel.rb:606
                               MSpec.protect at ./mspec/runner/mspec.rb:125
                              MSpec.files {} at ./mspec/runner/mspec.rb:44
                                  Array#each at kernel/core/array.rb:573
                                 MSpec.files at ./mspec/runner/mspec.rb:41
                               MSpec.process at ./mspec/runner/mspec.rb:33
                                 MSpecCI#run at mspec/bin/mspec-ci:65
                                MSpecCI.main at ./mspec/bin/script.rb:77
                           Object#__script__ at mspec/bin/mspec-ci:72
                    CompiledMethod#as_script at kernel/core/compiled_method.rb:326
                         Compile.single_load at kernel/core/compile.rb:238
                 Compile.load_from_extension at kernel/core/compile.rb:310
                           Object#__script__ at kernel/loader.rb:190