Ubuntu Optional step to Compile rms.cpp is formatted wrong

[adioni]

The example g++ command to run on Ubuntu systems has an em-dash in front of libs and will results in error messages if one just copies and pastes it in to the command line:

BAD:

g++ -o run_rms_tests.out rms.cpp `gsl-config --cflags —libs` 

GOOD:

g++ -o run_rms_tests.out rms.cpp `gsl-config --cflags --libs` 

[yupenghe]

Thanks for catching that. I just fixed this typo.