diff --git a/libraries/export/yaml.php b/libraries/export/yaml.php
index 55ef8d67ed..946e878f0e 100644
--- a/libraries/export/yaml.php
+++ b/libraries/export/yaml.php
@@ -73,7 +73,7 @@ if (isset($plugin_list)) {
     /**
      * Outputs database header
      *
-     * @param string  $db Database name
+     * @param string $db Database name
      *
      * @return bool Whether it succeeded
      *
@@ -87,7 +87,7 @@ if (isset($plugin_list)) {
     /**
      * Outputs database footer
      *
-     * @param string  $db Database name
+     * @param string $db Database name
      *
      * @return bool Whether it succeeded
      *
@@ -101,7 +101,7 @@ if (isset($plugin_list)) {
     /**
      * Outputs CREATE DATABASE statement
      *
-     * @param string  $db Database name
+     * @param string $db Database name
      *
      * @return bool Whether it succeeded
      *
@@ -115,11 +115,11 @@ if (isset($plugin_list)) {
     /**
      * Outputs the content of a table in YAML format
      *
-     * @param string  $db         database name
-     * @param string  $table      table name
-     * @param string  $crlf       the end of line sequence
-     * @param string  $error_url  the url to go back in case of error
-     * @param string  $sql_query  SQL query for obtaining data
+     * @param string $db        database name
+     * @param string $table     table name
+     * @param string $crlf      the end of line sequence
+     * @param string $error_url the url to go back in case of error
+     * @param string $sql_query SQL query for obtaining data
      *
      * @return bool Whether it succeeded
      *