Adds double quotes in mysql configuration example (#12229).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@10729 e93f8b46-1217-0410-a6f0-8f06a7374b81

config/database.yml.example

@@ -7,7 +7,7 @@ production:
   database: redmine
   host: localhost
   username: root
-  password:
+  password: ""
   encoding: utf8
 
 development:
@@ -15,7 +15,7 @@ development:
   database: redmine_development
   host: localhost
   username: root
-  password:
+  password: ""
   encoding: utf8
 
 # Warning: The database defined as "test" will be erased and
@@ -26,7 +26,7 @@ test:
   database: redmine_test
   host: localhost
   username: root
-  password:
+  password: ""
   encoding: utf8
 
 test_pgsql: