Argument Parsing

- Obsoleted Command::exectute  'commandLine' argument.  It is worse
  than unnecessary, it is an uncategorized raw argument string, which
  is only really useful for the 'execute' command, which itself now
  calls Arguments::combine to reconstruct the command line string.

src/commands/CmdEdit.cpp

@@ -52,7 +52,7 @@ CmdEdit::CmdEdit ()
 // Introducing the Silver Bullet.  This feature is the catch-all fixative for
 // various other ills.  This is like opening up the hood and going in with a
 // wrench.  To be used sparingly.
-int CmdEdit::execute (const std::string&, std::string& output)
+int CmdEdit::execute (std::string& output)
 {
   int rc = 0;