Fix whitespace errors in include/**

Two types of errors:

* Trailing whitespace.
* Empty line at the end of a file.

No functional changes.

include/internal/catch_common.h

@@ -128,4 +128,3 @@ namespace Catch {
 #define CATCH_INTERNAL_ERROR( msg ) ::Catch::throwLogicError( msg, CATCH_INTERNAL_LINEINFO );
 
 #endif // TWOBLUECUBES_CATCH_COMMON_H_INCLUDED
-

include/internal/catch_common.hpp

@@ -100,4 +100,3 @@ namespace Catch {
 }
 
 #endif // TWOBLUECUBES_CATCH_COMMON_HPP_INCLUDED
-

include/internal/catch_compiler_capabilities.h

@@ -164,4 +164,3 @@
 
 
 #endif // TWOBLUECUBES_CATCH_COMPILER_CAPABILITIES_HPP_INCLUDED
-