ENH: remove trailing space

Modules/CPackDeb.cmake

@@ -42,7 +42,9 @@ IF(NOT CPACK_DEBIAN_PACKAGE_ARCHITECTURE)
     SET(CPACK_DEBIAN_PACKAGE_ARCHITECTURE i386)
   ENDIF(NOT DPKG_CMD)
   EXECUTE_PROCESS(COMMAND "${DPKG_CMD}" --print-architecture
-    OUTPUT_VARIABLE CPACK_DEBIAN_PACKAGE_ARCHITECTURE)
+    OUTPUT_VARIABLE CPACK_DEBIAN_PACKAGE_ARCHITECTURE
+    OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
 ENDIF(NOT CPACK_DEBIAN_PACKAGE_ARCHITECTURE)
 
 # have a look at GET_PROPERTY(result GLOBAL PROPERTY ENABLED_FEATURES),