add changelog style to command line template.
to use, "hg log --style=changelog". makes different output with no
flags, -q, -v, --debug.
templater module has new template filters for this.
email - committer email address
fill68 - refill text to 68 colums
fill76 - refill text to 76 colums
tabindent - prefix every not empty line with tab
shortdate - iso 8631 date, no time zone
stringify - turn template iterator into string
changeset = '{date|shortdate} {author|person} <{author|email}> ({node|short}{tags})\n\n\t* {files|stringify|fill68|tabindent}{desc|fill68|tabindent|strip}\n\n'
changeset_quiet = '{date|shortdate} {author|person} <{author|email}>\n\n\t* {desc|firstline|fill68|tabindent|strip}\n\n'
changeset_verbose = '{date|isodate} {author|person} <{author|email}> ({node|short}{tags})\n\n\t* {file_adds|stringify|fill68|tabindent}{file_dels|stringify|fill68|tabindent}{files|stringify|fill68|tabindent}{desc|fill68|tabindent|strip}\n\n'
start_tags = ' ['
tag = '{tag}, '
last_tag = '{tag}]'
start_files = '('
file = '{file}, '
last_file = '{file}):\n\t'
start_file_adds = '('
file_add = '{file_add}, '
last_file_add = '{file_add}): new file.\n* '
start_file_dels = '('
file_del = '{file_del}, '
last_file_del = '{file_del}): deleted file.\n* '