run-test: use byte for 'common-pattern.py' path This is required for Python 3.

templates: reword 'back to filelog' link anchor text This anchor text is problematic in two ways: first, the "back to" part assumes that you got to the page showing it via the filelog. This is not necessarily true, as there are other ways to get to that view besides the filelog view, such as for example following the history of lines from a file. Second, it uses "filelog" jargon, which refers to how each file has its own revlog. This is internal jargon that has no business being exposed to the end user. I just reworded this template to improve understanding.

hgweb: show obsolescence status of a commit As with phases, spartan theme shows a simple "obsolete: yes" on its own line (this allows replacing "yes" with something more useful in future, like output of obsfate* template functions). Everywhere else a new "tag" is added to the same line that has phase, branch, etc of a changeset; in gitweb and monoblue the element has gray background, in paper and coal the element is gray with a dashed underline.