Fix cat docs

Author: Andrey Ershov

docs/reference/cat/snapshots.asciidoc

@@ -18,9 +18,9 @@ Which looks like:
 
 [source,txt]
 --------------------------------------------------
-id     status start_epoch start_time end_epoch  end_time duration indices successful_shards failed_shards total_shards
-snap1  FAILED 1445616705  18:11:45   1445616978 18:16:18     4.6m       1                 4             1            5
-snap2 SUCCESS 1445634298  23:04:58   1445634672 23:11:12     6.2m       2                10             0           10
+id    repository status start_epoch start_time end_epoch  end_time duration indices successful_shards failed_shards total_shards
+snap1 repo1      FAILED  1445616705  18:11:45   1445616978 18:16:18     4.6m       1                 4             1            5
+snap2 repo1      SUCCESS 1445634298  23:04:58   1445634672 23:11:12     6.2m       2                10             0           10
 --------------------------------------------------
 // TESTRESPONSE[s/FAILED/SUCCESS/ s/14456\d+/\\d+/ s/\d+(\.\d+)?(m|s|ms)/\\d+(\\.\\d+)?(m|s|ms)/]
 // TESTRESPONSE[s/\d+:\d+:\d+/\\d+:\\d+:\\d+/]