Fix whitespace with "make format".

model/metric.go

@@ -14,8 +14,8 @@
 package model
 
 import (
-	"time"
 	"fmt"
+	"time"
 )
 
 // A Fingerprint is a simplified representation of an entity---e.g., a hash of

rules/ast/ast.go

@@ -537,7 +537,6 @@ func (matrix Matrix) Swap(i, j int) {
 	matrix[i], matrix[j] = matrix[j], matrix[i]
 }
 
-
 func (node *StringLiteral) Eval(timestamp *time.Time) string {
 	return node.str
 }