diff --git a/core/modules/migrate/src/Plugin/migrate/process/StaticMap.php b/core/modules/migrate/src/Plugin/migrate/process/StaticMap.php
index 72b8a04..e1043b3 100644
--- a/core/modules/migrate/src/Plugin/migrate/process/StaticMap.php
+++ b/core/modules/migrate/src/Plugin/migrate/process/StaticMap.php
@@ -15,10 +15,11 @@
  * The static_map source plugin allows looking up a value based on a map
  * specified in the configuration.
  *
- *  Available configuration keys
- *    - source:
- *    - map:
- *    - bypass:
+ * Available configuration keys
+ * - source:
+ * - map:
+ * - bypass:
+ * - default_value
  *
  * Examples:
  *
@@ -32,10 +33,10 @@
  *       this: that
  * @endcode
  *
- * If the value of the source property foo was from then the value of the
- * destination property bar will be to. Similarly this becomes that. static_map
- * can do a lot more than this: it supports a list of source properties. This is
- * super useful in module-delta to machine name conversions.
+ * If the value of the source property foo was "from" then the value of the
+ * destination property bar will be "to". Similarly "this" becomes "that".
+ * static_map can do a lot more than this: it supports a list of source
+ * properties. This is super useful in module-delta to machine name conversions.
  *
  * @code
  * process:
@@ -55,11 +56,11 @@
  *          0: php_code
  * @endcode
  *
- * If the value of the source properties module and delta are filter and 2
- * respectively, then the value of the destination id will be filter_url. By
+ * If the value of the source properties module and delta are "filter" and "2"
+ * respectively, then the value of the destination id will be "filter_url". By
  * default, if a value is not found in the map, an exception is thrown. This is
  * desirable in the above example. When static_map is used to just rename a few
- * things and leave the others, a bypass: true option can be added. In this
+ * things and leave the others, a "bypass: true" option can be added. In this
  * case, the source value is used unchanged.
  *
  * Also, a default_value can be provided.
@@ -75,9 +76,9 @@
  *       default_value: bar
  * @endcode
  *
- * If the lookup fails, this value is used instead. Note that using the default
- * value plugin after would not work as the pipeline has a value at this point:
- * the value of the source specified for the static_map.
+ * If the lookup fails, this default_value is used instead. Note that using the
+ * default value plugin after would not work as the pipeline has a value at this
+ * point: the value of the source specified for the static_map.
  *
  * @see \Drupal\migrate\Plugin\MigrateProcessInterface
  *