Single-word clarification in postgresql.conf log_truncate_on_rotation

comment.

src/backend/utils/misc/postgresql.conf.sample

@@ -274,7 +274,7 @@
 					# can include strftime() escapes
 #log_file_mode = 0600			# creation mode for log files,
 					# begin with 0 to use octal notation
-#log_truncate_on_rotation = off		# If on, an existing log file of the
+#log_truncate_on_rotation = off		# If on, an existing log file with the
 					# same name as the new log file will be
 					# truncated rather than appended to.
 					# But such truncation only occurs on