graph: in hgrc specify line width for main branch
You can specify width to visually distinguish main branch (trunk)
on hgweb's graph page. Settings format is branch_name.width = value,
where width in px e.g.:
[graph]
default.width = 3
filemerge: create detail of internal merge tools from documentation string
this patch introduces 'internaltoolsmarker' which creates detail of
each internal merge tools from documentation string for 'hg help merge-tools'.