Fixed JSON formatting issue affecting Couch and Mongo sinks.
Fixed JSON formatting issue affecting Couch and Mongo sinks.

adamchester/serilog,redwards510/serilog,clarkis117/serilog,clarkis117/serilog,adamchester/serilog,SaltyDH/serilog,ajayanandgit/serilog,skomis-mm/serilog,merbla/serilog,ravensorb/serilog,vorou/serilog,jotautomation/serilog,vossad01/serilog,DavidSSL/serilog,richiej84/serilog,Jaben/serilog,richardlawley/serilog,paulcbetts/serilog,serilog/serilog,CaioProiete/serilog,merbla/serilog,ravensorb/serilog,joelweiss/serilog,paulcbetts/serilog,skomis-mm/serilog,joelweiss/serilog,Applicita/serilog,nblumhardt/serilog,khellang/serilog,serilog/serilog,harishjan/serilog,colin-young/serilog,colin-young/serilog,nblumhardt/serilog,zmaruo/serilog,harishjan/serilog,JuanjoFuchs/serilog