Use Go 1.13 error features

* Use `errors.Is()` for unwrapping errors.
* Use `%w` error verb in internal error formatting.

Signed-off-by: Ben Kochie <superq@gmail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/collector/schedstat_linux.go b/collector/schedstat_linux.go
index 9e5b744..9f29a7e 100644
--- a/collector/schedstat_linux.go
+++ b/collector/schedstat_linux.go
@@ -16,6 +16,7 @@
 package collector
 
 import (
+        "errors"
         "fmt"
         "os"
 
@@ -72,7 +73,7 @@ func init() {
 func (c *schedstatCollector) Update(ch chan<- prometheus.Metric) error {
         stats, err := c.fs.Schedstat()
         if err != nil {
-                if os.IsNotExist(err) {
+                if errors.Is(err, os.ErrNotExist) {
                         level.Debug(c.logger).Log("msg", "schedstat file does not exist")
                         return ErrNoData
                 }