Treat += as = in absence of existing value.
Treat += as = in absence of existing value.

Max-Coin/maxcoin-abe,ultracoindev/ultracoin-abe,jonnynewbs/bitcoin-abe,gjhiggins/altcoin-abe,jeorgen/bitcoin-abe,Rimbit/RimbitExplorer,Cybnate/NuBits-Abe-explorer,ultracoindev/ultracoin-abe,UdjinM6/darkcoin-abe,gjhiggins/chaincoin-abe,machado-rev/HTMLCoinExplorer,ultracoindev/ultracoin-abe,jeorgen/bitcoin-abe,gjhiggins/chaincoin-abe,cryptapus/bitcoin-abe,CraigsCoin/abe-craigscoin,MatthewLM/PeercoinAbeExplorer,cryptapus/bitcoin-abe,Cybnate/NuBits-Abe-explorer,gjhiggins/altcoin-abe,Dilmacoin/dilmacoin-abe,machado-rev/HTMLCoinExplorer,leadcoin-reboot/leadcoin-abe,jeromewu/bitcoin-abe-opennet,MatthewLM/PeercoinAbeExplorer,machinecoin-project/machinecoin-blockchainexplorer-abe,gjhiggins/abe-bee2,Serya05/bitcoin-abe,BuckyGreen/latiumexplorer,n00bsys0p/altcoin-abe,jonnynewbs/bitcoin-abe,MatthewLM/PeercoinAbeExplorer,ultracoindev/ultracoin-abe,Rimbit/RimbitExplorer,MatthewLM/PeercoinAbeExplorer,BuckyGreen/latiumexplorer,Serya05/bitcoin-abe,muchbeli/bitcoin-abe,UdjinM6/darkcoin-abe,Cybnate/NuBits-Abe-explorer,Rimbit/RimbitExplorer,Cybnate/NuBits-Abe-explorer,machado-rev/HTMLCoinExplorer,Rimbit/RimbitExplorer,leadcoin-reboot/leadcoin-abe,machado-rev/HTMLCoinExplorer,muchbeli/bitcoin-abe,machinecoin-project/machinecoin-blockchainexplorer-abe,BuckyGreen/latiumexplorer,CraigsCoin/abe-craigscoin,Cybnate/NuBits-Abe-explorer,mmitech/bitcoin-abe,BuckyGreen/latiumexplorer,muchbeli/bitcoin-abe,gjhiggins/abe-bee2,jeromewu/bitcoin-abe-opennet,sacarlson/bitcoin-abe,gjhiggins/abe-bee2,muchbeli/bitcoin-abe,mmitech/bitcoin-abe,ultracoindev/ultracoin-abe,Dilmacoin/dilmacoin-abe,Max-Coin/maxcoin-abe,n00bsys0p/altcoin-abe