Clara ignores anything after a lone — (double dash)

- this allows use within an environment that appends additional arguments that Clara will otherwise reject
- generated build 23

include/internal/catch_version.hpp

@@ -13,7 +13,7 @@
 namespace Catch {
 
     // These numbers are maintained by a script
-    Version libraryVersion( 1, 0, 22, "master" );
+    Version libraryVersion( 1, 0, 23, "master" );
 }
 
 #endif // TWOBLUECUBES_CATCH_VERSION_HPP_INCLUDED

include/internal/clara.h

@@ -206,7 +206,8 @@ namespace Clara {
         };
 
         void parseIntoTokens( int argc, char const * const * argv, std::vector<Parser::Token>& tokens ) const {
-            for( int i = 1; i < argc; ++i )
+            const std::string doubleDash = "--";
+            for( int i = 1; i < argc && argv[i] != doubleDash; ++i )
                 parseIntoTokens( argv[i] , tokens);
         }
         void parseIntoTokens( std::string arg, std::vector<Parser::Token>& tokens ) const {