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Gem::MissingSpecVersionError 

        # Gem::MissingSpecVersionError < Gem::MissingSpecError

(from ruby core)
---
Raised when trying to activate a gem, and the gem exists on the system,
but not the requested version. Instead of rescuing from this class, make
sure to rescue from the superclass Gem::LoadError to catch all types of
load errors.
---
# Class methods:

    new

# Instance methods:

    build_message
    specs

# Attributes:

    attr_reader specs

This is MURDOC! A Ruby documentation browser inspired by Smalltalk-80. It allows you to learn about Ruby by browsing through its class hierarchies, and see any of its methods.