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/CmdVersion.cpp

@@ -46,7 +46,7 @@ CmdVersion::CmdVersion ()
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-int CmdVersion::execute (const std::string&, std::string& output)
+int CmdVersion::execute (std::string& output)
 {
   std::stringstream out;
 
@@ -128,9 +128,7 @@ CmdCompletionVersion::CmdCompletionVersion ()
 }
 
 ////////////////////////////////////////////////////////////////////////////////
-int CmdCompletionVersion::execute (
-  const std::string&,
-  std::string& output)
+int CmdCompletionVersion::execute (std::string& output)
 {
 #ifdef HAVE_COMMIT
   output = COMMIT;