doc: Fix syntax of a URL
Leading white space before the "http:" is apparently treated as a
relative link at least by some browsers.
Branch
------
master
Details
-------
http://git.postgresql.org/pg/commitdiff/693eb9dfd97da7fc970e9f525a04239a1cb22654
Modified Files
--------------
doc/src/sgml/installation.sgml | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)