Fix docstring for SAMPClient.start and ensure that _is_running does not get set if the client is not callable.
Fix docstring for SAMPClient.start and ensure that _is_running does not get set if the client is not callable.

StuartLittlefair/astropy,lpsinger/astropy,aleksandr-bakanov/astropy,AustereCuriosity/astropy,larrybradley/astropy,mhvk/astropy,stargaser/astropy,astropy/astropy,MSeifert04/astropy,aleksandr-bakanov/astropy,StuartLittlefair/astropy,funbaker/astropy,dhomeier/astropy,larrybradley/astropy,joergdietrich/astropy,astropy/astropy,mhvk/astropy,AustereCuriosity/astropy,bsipocz/astropy,tbabej/astropy,pllim/astropy,dhomeier/astropy,aleksandr-bakanov/astropy,joergdietrich/astropy,bsipocz/astropy,pllim/astropy,mhvk/astropy,joergdietrich/astropy,saimn/astropy,kelle/astropy,dhomeier/astropy,DougBurke/astropy,DougBurke/astropy,mhvk/astropy,saimn/astropy,pllim/astropy,joergdietrich/astropy,mhvk/astropy,larrybradley/astropy,kelle/astropy,StuartLittlefair/astropy,MSeifert04/astropy,AustereCuriosity/astropy,larrybradley/astropy,StuartLittlefair/astropy,tbabej/astropy,pllim/astropy,AustereCuriosity/astropy,dhomeier/astropy,DougBurke/astropy,pllim/astropy,bsipocz/astropy,DougBurke/astropy,stargaser/astropy,stargaser/astropy,kelle/astropy,lpsinger/astropy,funbaker/astropy,kelle/astropy,MSeifert04/astropy,AustereCuriosity/astropy,funbaker/astropy,saimn/astropy,joergdietrich/astropy,tbabej/astropy,astropy/astropy,stargaser/astropy,StuartLittlefair/astropy,saimn/astropy,larrybradley/astropy,funbaker/astropy,tbabej/astropy,kelle/astropy,lpsinger/astropy,saimn/astropy,astropy/astropy,aleksandr-bakanov/astropy,bsipocz/astropy,astropy/astropy,tbabej/astropy,MSeifert04/astropy,lpsinger/astropy,lpsinger/astropy,dhomeier/astropy