one more space removed from the tag, relates to #289

CMakeLists.txt

@@ -18,7 +18,7 @@ find_package(Git)
 if(GIT_FOUND)
     execute_process(COMMAND ${GIT_EXECUTABLE} describe --abbrev=7 --dirty --always --tags RESULT_VARIABLE res_var OUTPUT_VARIABLE GIT_COM_ID )
     if( NOT ${res_var} EQUAL 0 )
-        set( GIT_COMMIT_ID "git commit id unknown")
+        set( GIT_COMMIT_ID "unknown--git-commit-id-unknown")
         message( WARNING "Git failed (not a repo, or no tags). Build will not contain git revision info." )
     else()
         string( REPLACE "\n" "" GIT_COMMIT_ID ${GIT_COM_ID} )