fix some typo (#1482)

infra/conf/jsonpb/jsonpb.go

@@ -64,7 +64,7 @@ func init() {
 				}
 				return loadJSONPB(bytes.NewReader(data))
 			default:
-				return nil, newError("unknow type")
+				return nil, newError("unknown type")
 			}
 		},
 	}))

infra/conf/merge/merge.go

@@ -3,7 +3,7 @@
 // license that can be found in the LICENSE file.
 
 /*
-Package merge provides the capbility to merge multiple
+Package merge provides the capability to merge multiple
 JSON files or contents into one output.
 
 Merge Rules:

infra/conf/mergers/merge.go

@@ -58,7 +58,7 @@ func Merge(input interface{}, m map[string]interface{}) error {
 			return err
 		}
 	default:
-		return newError("unknow merge input type")
+		return newError("unknown merge input type")
 	}
 	return nil
 }

infra/conf/mergers/merger_base.go

@@ -52,7 +52,7 @@ func makeToJSONMergeFunc(converter func(v []byte) ([]byte, error)) MergeFunc {
 				return err
 			}
 		default:
-			return newError("unknow merge input type")
+			return newError("unknown merge input type")
 		}
 		return nil
 	}

infra/conf/synthetic/router/router_strategy.go

@@ -34,7 +34,7 @@ type strategyLeastLoadConfig struct {
 	Baselines []duration.Duration `json:"baselines,omitempty"`
 	// expected nodes count to select
 	Expected int32 `json:"expected,omitempty"`
-	// max acceptable rtt, filter away high delay nodes. defalut 0
+	// max acceptable rtt, filter away high delay nodes. default 0
 	MaxRTT duration.Duration `json:"maxRTT,omitempty"`
 	// acceptable failure rate
 	Tolerance float64 `json:"tolerance,omitempty"`

infra/conf/v2jsonpb/v2jsonpb.go

@@ -63,7 +63,7 @@ func init() {
 				}
 				return loadV2JsonPb(data)
 			default:
-				return nil, newError("unknow type")
+				return nil, newError("unknown type")
 			}
 		},
 	}))