More cleanup associated with removing Java dialog boxes (cset b5d9b95d1e1a). * NEWS: List errordlg only once in list of Java functions removed. * errordlg.m: Use a single sentence description of function for first documentation paragraph. Correct misspelling of "occurred". Match variable names in code to those in docstring. * helpdlg.m, warndlg.m: Use a single sentence description of function for first documentation paragraph. Match variable names in code to those in docstring. * inputdlg.m: Match variable names in code to those in docstring. Use function name as prefix to all error messages. Use spaces and line wrapping to make %!demos more readable. * listdlg.m: Re-order and rephrase some of docstring. Add more input validation. Add new BIST tests for input validation. * questdlg.m: Re-order some of docstring. Use function name as prefix to all error messages. Eliminate unreachable otherwise statement in switch block. Add new BIST tests for input validation.

4a3a7c6111c880258a2da90ffbb9eb53e421529f gnulib-hg