GUACAMOLE-630: Clarify usage of argv-related guac_user_callback implementations.
diff --git a/src/protocols/kubernetes/argv.h b/src/protocols/kubernetes/argv.h
index 1a23df1..2fc6c1b 100644
--- a/src/protocols/kubernetes/argv.h
+++ b/src/protocols/kubernetes/argv.h
@@ -41,9 +41,8 @@
  * Sends the current values of all non-sensitive parameters which may be set
  * while the connection is running to the given user. Note that the user
  * receiving these values will not necessarily be able to set new values
- * themselves if their connection is read-only. This function is provided for
- * convenience, as it is can be used as the callback for
- * guac_client_foreach_user() or guac_client_for_owner().
+ * themselves if their connection is read-only. This function can be used as
+ * the callback for guac_client_foreach_user() and guac_client_for_owner()
  *
  * @param user
  *     The user that should receive the values of all non-sensitive parameters
diff --git a/src/protocols/ssh/argv.h b/src/protocols/ssh/argv.h
index c7b8559..186e0b5 100644
--- a/src/protocols/ssh/argv.h
+++ b/src/protocols/ssh/argv.h
@@ -41,9 +41,8 @@
  * Sends the current values of all non-sensitive parameters which may be set
  * while the connection is running to the given user. Note that the user
  * receiving these values will not necessarily be able to set new values
- * themselves if their connection is read-only. This function is provided for
- * convenience, as it is can be used as the callback for
- * guac_client_foreach_user() or guac_client_for_owner().
+ * themselves if their connection is read-only. This function can be used as
+ * the callback for guac_client_foreach_user() and guac_client_for_owner()
  *
  * @param user
  *     The user that should receive the values of all non-sensitive parameters
diff --git a/src/protocols/telnet/argv.h b/src/protocols/telnet/argv.h
index 4bbf869..e362e14 100644
--- a/src/protocols/telnet/argv.h
+++ b/src/protocols/telnet/argv.h
@@ -41,9 +41,8 @@
  * Sends the current values of all non-sensitive parameters which may be set
  * while the connection is running to the given user. Note that the user
  * receiving these values will not necessarily be able to set new values
- * themselves if their connection is read-only. This function is provided for
- * convenience, as it is can be used as the callback for
- * guac_client_foreach_user() or guac_client_for_owner().
+ * themselves if their connection is read-only. This function can be used as
+ * the callback for guac_client_foreach_user() and guac_client_for_owner()
  *
  * @param user
  *     The user that should receive the values of all non-sensitive parameters