JuliaLang/julia — pull request #7873 by StephenVavasis (2014-08-07 02:19:09+00:00)
Title: more explanation of immutable

Some aspects of 'immutable' escaped me when I first read the manual and were clarified by Stefan Karpinski. II think other new users might benefit from this clarification, so I put some additional paragraphs in the manual.