Polish documentation

Closes gh-2642

spring-boot-docs/src/main/asciidoc/howto.adoc

@@ -2034,9 +2034,10 @@ NOTE: You can output the schema creation by enabling the `org.hibernate.SQL` log
 is done for you automatically if you enable the <<boot-features-logging-console-output,debug mode>>.
 
 In addition, a file named `import.sql` in the root of the classpath will be executed on
-startup. This can be useful for demos and for testing if you are careful, but probably
-not something you want to be on the classpath in production. It is a Hibernate feature
-(nothing to do with Spring).
+startup if Hibernate creates the schema from scratch (that is if the `ddl-auto` property
+is set to `create` or `create-drop`). This can be useful for demos and for testing if you
+are careful, but probably not something you want to be on the classpath in production. It
+is a Hibernate feature (nothing to do with Spring).
 
 
 [[howto-initialize-a-database-using-spring-jdbc]]