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/CmdHistory.h

@@ -35,28 +35,28 @@ class CmdHistoryMonthly : public Command
 {
 public:
   CmdHistoryMonthly ();
-  int execute (const std::string&, std::string&);
+  int execute (std::string&);
 };
 
 class CmdHistoryAnnual : public Command
 {
 public:
   CmdHistoryAnnual ();
-  int execute (const std::string&, std::string&);
+  int execute (std::string&);
 };
 
 class CmdGHistoryMonthly : public Command
 {
 public:
   CmdGHistoryMonthly ();
-  int execute (const std::string&, std::string&);
+  int execute (std::string&);
 };
 
 class CmdGHistoryAnnual : public Command
 {
 public:
   CmdGHistoryAnnual ();
-  int execute (const std::string&, std::string&);
+  int execute (std::string&);
 };
 
 #endif