You are correct about "last", "start's, etc., but there are also good examples in the CS sourcecode of easily avoiding naming conflicts with a sensible naming convention:

  browser.coffee:CoffeeScript = require './coffee-script'
  coffee-script.coffee:{Lexer,RESERVED} = require './lexer'
  coffee-script.coffee:    {Module} = require 'module'
  command.coffee:{EventEmitter} = require 'events'
  grammar.coffee:{Parser} = require 'jison'
  lexer.coffee:{Rewriter, INVERSES} = require './rewriter'
  nodes.coffee:{Scope} = require './scope'
  nodes.coffee:{RESERVED} = require './lexer'
  repl.coffee:{Script}     = require 'vm'