hgweb: simplify a constant-length list by converting to literal tuple
The call to `.append()` has been unnecessary since d3dbdca92458
(hgweb: don't choke when an inexistent style is requested (issue1901),
2009-11-12).
Differential Revision: https://phab.mercurial-scm.org/D8898
lib - sys sys
mercurial - sys sys
hgrc.d - sys sys
9diff.rc - sys sys
factotum.rc - sys sys
rc - sys sys
bin - sys sys
9diff - sys sys
hg - sys sys
sys - sys sys
lib - sys sys
python - sys sys
lib - sys sys
python2.5 - sys sys
site-packages - sys sys
hgext - sys sys
+ - sys sys
mercurial - sys sys
+ - sys sys
mercurial-VERSION-py2.5.egg-info - sys sys
src - sys sys
cmd - sys sys
hg - sys sys
+ - sys sys