fix linter warnings: goimports, wsl

Signed-off-by: akartasov <agneum@gmail.com>

pkg/mapper/escape.go

@@ -39,7 +39,9 @@ func EscapeMetricName(metricName string) string {
 	// This is an character replacement method optimized for this limited
 	// use case.  It is much faster than using a regex.
 	offset := 0
+
 	var prevChar rune
+
 	for i, c := range metricName {
 		// Seek forward, skipping valid characters until we find one that needs
 		// to be replaced, then add all the characters we've seen so far to the

pkg/mapper/escape_test.go

@@ -23,7 +23,7 @@ func TestEscapeMetricName(t *testing.T) {
 		"with--doubledash":        "with_doubledash",
 		"with---multiple-dashes":  "with_multiple_dashes",
 		"with.dot":                "with_dot",
-		"with😱emoji":             "with_emoji",
+		"with😱emoji":              "with_emoji",
 		"with.*.multiple":         "with___multiple",
 		"test.web-server.foo.bar": "test_web_server_foo_bar",
 		"":                        "",