Fix example format in system df man
Fix the formatting of the examples in the
podman system df man page.
@@ -18,7 +18,7 @@ Pretty-print images using a Go template
Show detailed information on space usage
## EXAMPLE
-
+```
$ podman system df
TYPE TOTAL ACTIVE SIZE RECLAIMABLE
Images 6 2 281MB 168MB (59%)
@@ -49,7 +49,7 @@ $ podman system df --format "{{.Type}}\t{{.Total}}"
Images 1
Containers 5
Local Volumes 1
-
+```
## SEE ALSO
podman-system(1)
