Add a test to see if RGI IDs can be extended with suffixes (they can) (#277)
Add a test to see if RGI IDs can be extended with suffixes (they can) (#277)


anoukvlug/oggm,anoukvlug/oggm,TimoRoth/oggm,juliaeis/oggm,OGGM/oggm,OGGM/oggm,bearecinos/oggm,bearecinos/oggm,juliaeis/oggm,TimoRoth/oggm