fix travis.yml

.travis.yml

@@ -1,5 +1,5 @@
 language: cpp
 before_install:
  - sudo apt-get update -qq
- - sudo apt-get install -qq dpkg-dev, debhelper, libdb-dev, gettext, libcurl4-gnutls-dev, zlib1g-dev, libbz2-dev, xsltproc, docbook-xsl, docbook-xml, po4a, autotools-dev, autoconf, automake, doxygen, debiandoc-sgml
+ - sudo apt-get install -qq dpkg-dev debhelper libdb-dev gettext libcurl4-gnutls-dev zlib1g-dev libbz2-dev xsltproc docbook-xsl docbook-xml po4a autotools-dev autoconf automake doxygen debiandoc-sgml
 script: test/integration/run-tests