1. Features
The following commands now also have experimental formatter support: 'hg version', 'hg grep' and 'hg config'
New template keywords and functions: termwidth, mod(a, b), relpath(path)
Basic arithmetic operations in template such as termwidth - 10
follow() revset takes new startrev parameter
Bash completion now allows skipping potentially expensive status call for completing 'hg status' arguments, using $HGCOMPLETE_NOSTATUS environment variable
2. Improvements
A number of changes were made to move and copy tracking, to make sure move and copy information is not lost during commands like 'hg graft'
Compound revset expression is now properly ordered
Python 3 support has received a lot of improvements (but will take a lot of additional work)
zlib performance in hgweb is improved, and it's possible to control zlib compression level using server.zliblevel option
Detailed changelog:
1.1. commands
annotate: calculate line count correctly
branchmap: acquires lock before writting the rev branch cache
clone: set default path correctly when doing a clone+share (issue5378)
copy: distinguish "file exists" cases and add a hint (BC)
commit: return 1 for interactive commit with no changes (issue5397)
config: add template support
debugobsolete: add formatter support (issue5134)
files: change documentation to match its behaviour (issue5276)
grep: add formatter support
help: show content for explicitly disabled extension (issue5228)
import: abort instead of crashing when copy source does not exist (issue5375)
import: report directory-relative paths in error messages (issue5224)
log: copy the way of ancestor traversal to --follow matcher (issue5376)
log: preserve topo sort in graph even if additional filter options specified
merge: add conflict labels to merge command
merge: avoid superfluous filemerges when grafting through renames (issue5407)
strip: report both bundle files in case of exception (issue5368)
tag: clarify warning about making a tag on a branch head
version: add formatter support
flags: allow specifying --no-boolean-flag on the command line (BC)
1.2. core
changelog: disable delta chains
copies: make _checkcopies handle copy sequences spanning the TCA (issue4028)
formatter: add function to convert list to appropriate format (issue5217)
lock: show more detail for new-style locks in lock waiting message (issue4752)
revset: do not rewrite ':y' to '0:y' (issue5385)
revset: fix order of nested '_(|int|hex)list' expression (BC)
revset: fix order of nested 'or' expression (BC)
revset: fix order of nested 'range' expression (BC)
revset: make reverse() and sort() no-ops when ordering requirement allows (BC)
revset: support "follow(renamed.py, e22f4f3f06c3)" (issue5334)
templater: provide a termwidth keyword (issue5395)
templater: add inheritance support to style maps
templater: add relpath() to convert repo path to relative path (issue5394)
templater: make pad() evaluate boolean argument (BC)
wireproto: unescape argument names in batch command (BC)
1.3. extensions
journal: properly check for held lock (issue5349)
journal: use fm.formatdate() to pass date tuple in appropriate type (BC)
journal: use fm.formatlist() to pass hashes in appropriate type (BC)
journal: use fm.hexfunc() to get full hash in JSON/template output (BC)
largefiles: fix 'deleted' files sometimes persistently appearing with R status
largefiles: handle that a found standin file doesn't exist when removing it
largefiles: more safe handling of interruptions while updating modifications
largefiles: when setting/clearing x bit on largefiles, don't change other bits
mq: release lock after transaction in qrefresh
mq: take wlock when 'qqueue' is doing write operations
rebase: properly calculate total commits to rebase (issue5347)
rebase: rebase changesets in topo order (issue5370) (BC)
1.4. hgweb
hgweb: avoid line wrap between revision and annotate-info (issue5398)
hgweb: config option to control zlib compression level
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