parse_expected

# File lib/spec/matchers/be.rb, line 124
        def parse_expected(expected)
          if Symbol === expected
            @handling_predicate = true
            ["be_an_","be_a_","be_"].each do |prefix|
              if expected.starts_with?(prefix)
                @prefix = prefix
                return "#{expected.to_s.sub(@prefix,"")}".to_sym
              end
            end
          end
          @prefix = ""
          return expected
        end