class Gem::MissingSpecError

superclass Gem::LoadError to catch all types of load errors.
system. Instead of rescuing from this class, make sure to rescue from the
Raised when trying to activate a gem, and that gem does not exist on the
#

def build_message 

def build_message
  total = Gem::Specification.stubs.size
  "Could not find '#{name}' (#{requirement}) among #{total} total gem(s)\n"
end

def initialize(name, requirement, extra_message=nil) 

def initialize(name, requirement, extra_message=nil)
  @name        = name
  @requirement = requirement
  @extra_message = extra_message
end

def message # :nodoc:

:nodoc: 
def message # :nodoc:
  build_message +
    "Checked in 'GEM_PATH=#{Gem.path.join(File::PATH_SEPARATOR)}' #{@extra_message}, execute `gem env` for more information"
end