fix flash_tag() with multiple attributes.
Merge pull request #1213 from tmtm/fix-flash_tag-with-multiple-attributes

fix flash_tag() with multiple attributes.
Merge remote-tracking branch 'upstream/master' into all-custom-error

* upstream/master:
  fix flash_tag() with multiple attributes.
Update TwitterBootstrap!
Merge branch 'master' into all-custom-error

* master:
  Update TwitterBootstrap!