Merge pull request #519 from TomasTomecek/document-tail-in-logs

docs: document parameter tail of method logs

Author: shin-

docs/api.md

@@ -451,6 +451,7 @@ output as it happens.
 * stderr (bool): Get STDERR
 * stream (bool): Stream the response
 * timestamps (bool): Show timestamps
+* tail (str or int): Output specified number of lines at the end of logs: `"all"` or `number`. Default `"all"`
 
 **Returns** (generator or str):