message: Correct corporation spread hint
diff: </TEXT>
  <TEXT>
  <Tag>TXT_KEY_HINT_DOC_16</Tag>
  - <English>To attract corporations, acquire more of its resources, build associated buildings, or adopt the Free Enterprise civic.</English>
  + <English>To attract a corporation, acquire more of its resources, build associated buildings, or adopt the Free Enterprise civic.</English>
  </TEXT>
  <TEXT>
  <Tag>TXT_KEY_HINT_DOC_17</Tag>
  