website: clarify log file filename format (#4856)

Fixes #4697

website/source/docs/agent/options.html.md

@@ -235,7 +235,7 @@ will exit with an error at startup.
   to an environment which communicates the HTTP port through the environment e.g. PaaS like CloudFoundry, allowing
   you to set the port directly via a Procfile.
 
-* <a name="_log_file"></a><a href="#_log_file">`-log-file`</a> - to redirect all the Consul agent log messages to a file. This can be specified with the complete path along with the name of the log. In case the path doesn't have the filename, the filename defaults to Consul-timestamp.log .  Can be combined with <a href="#_log_rotate_bytes"> -log-rotate-bytes</a> and <a href="#_log_rotate_duration"> -log-rotate-duration </a> for a fine-grained log rotation experience.
+* <a name="_log_file"></a><a href="#_log_file">`-log-file`</a> - to redirect all the Consul agent log messages to a file. This can be specified with the complete path along with the name of the log. In case the path doesn't have the filename, the filename defaults to `consul-{timestamp}.log`. Can be combined with <a href="#_log_rotate_bytes"> -log-rotate-bytes</a> and <a href="#_log_rotate_duration"> -log-rotate-duration </a> for a fine-grained log rotation experience.
 
 * <a name="_log_rotate_bytes"></a><a href="#_log_rotate_bytes">`-log-rotate-bytes`</a> - to specify the number of bytes that should be written to a log before it needs to be rotated. Unless specified, there is no limit to the number of bytes that can be written to a log file.