fix comment
fix comment

jmanero/flat-rocks,snowyu/node-nosql-leveldb,gastrodia/leveldown,juliangruber/a-native-module,timkuijsten/leveldown,mafintosh/leveldown-prebuilt,Level/leveldown-mobile,juliangruber/a-native-module-without-prebuild,gastrodia/leveldown,chjj/rocksdown,snowyu/node-nosql-leveldb,MathieuCassagne/leveldown,jmanero/flat-rocks,No9/leveldown,jmanero/flat-rocks,juliangruber/a-native-module-without-prebuild,ralphtheninja/leveldown,jhead/leveldown,gastrodia/leveldown,timkuijsten/leveldown,No9/leveldown,juliangruber/a-native-module,jhead/leveldown,MathieuCassagne/leveldown,juliangruber/a-native-module,Level/leveldown-mobile,Level/rocksdb,gastrodia/leveldown,chjj/rocksdown,Level/leveldown,juliangruber/a-native-module-without-prebuild,jhead/leveldown,snowyu/node-nosql-leveldb,jhead/leveldown,phillipj/leveldown,juliangruber/a-native-module-without-prebuild,Level/leveldown-mobile,phillipj/leveldown,snowyu/node-nosql-leveldb,mafintosh/leveldown-prebuilt,phillipj/leveldown,chjj/rocksdown,timkuijsten/leveldown,MathieuCassagne/leveldown,Level/leveldown-mobile,Level/leveldown,No9/leveldown,juliangruber/a-native-module,mafintosh/leveldown-prebuilt,timkuijsten/leveldown,snowyu/node-nosql-leveldb,Level/leveldown-mobile,jmanero/flat-rocks,Level/rocksdb,jmanero/flat-rocks,timkuijsten/leveldown,jhead/leveldown,gastrodia/leveldown,juliangruber/a-native-module-without-prebuild,MathieuCassagne/leveldown,mafintosh/leveldown-prebuilt,ralphtheninja/leveldown,juliangruber/a-native-module,ralphtheninja/leveldown,Level/leveldown,ralphtheninja/leveldown,chjj/rocksdown,phillipj/leveldown,No9/leveldown,ralphtheninja/leveldown,No9/leveldown,mafintosh/leveldown-prebuilt,Level/rocksdb,phillipj/leveldown,MathieuCassagne/leveldown