Fix mistake with env var example in docker run docs
@@ -403,10 +403,10 @@ VAR1=value1
VAR2=value2
USER
-$ docker run --env-file env.list ubuntu env | grep VAR
+$ docker run --env-file env.list ubuntu env | grep -E 'VAR|USER'
VAR1=value1
VAR2=value2
-USER=denis
+USER=jonzeolla
```
### Set metadata on container (-l, --label, --label-file)
