7.5

Basilisk

New in core:

1. :?~ clears the saved ?? capture statuses; with an argument it keeps
   them across commands instead of clearing after each one. Closes the
   remaining ?? control gaps.
2. :m![#marks] unsets line marks; no argument unsets all marks.
3. Optimized capture ids: O(1) lookup, kept ~O(1) amortized append,
   reduced memory usage with flat char array.
4. Unlimited alternations and captures in the regex engine: the
   compiler no longer uses fixed static arrays.
5. Substitution with the ^ flag anchors ^ at the start of every search
   instead of only the first; it implies g. The vi and vI keybinds use
   it to convert a whole indentation run.
6. Evolved syntax highlight extension system (former led_attsb). Now
   extensions are exposed to rendering and its' precomputed state. Extensions
   can reflect and build logic on top of existing highlights.
   Features efficient triple system with length encoding.

New in builds:

1. Build shell scripts (cbuild.sh, build_patch2vi.sh) accept options
   shortened to a minimal prefix: b, bu, c, d, i, p all work.
2. build_patch2vi.sh gained a pgobuild step. Trains the profile by
   applying deltas.sh through the embedded editor, then rebuilds with
   -fprofile-use.
3. Fixed the pgo training run in cbuild.sh: the training EXINIT now
   quits the session instead of only saving.

Bug fixes:

1. Substitution with the g flag no longer substitutes a zero-width match
   twice when the engine reports it ahead of the scan start, as with
   positional lookarounds like (?=^a). A :grp target group that ends at the
   scan start still advances past the match instead of re-matching it.
2. Zero-length match advances are UTF-8 aware: when a regex match is
   empty, the scan skips one whole character instead of one byte, in
   substitution, search, file index and directory reorder.
3. Out-of-range :f>/:f+ search the full range again; single-line
   ranges searched nothing at all.
4. Out-of-range :f< matches the whole pin line, bound at its end
   like the in-range cursor offset.
5. Fixed a memory-corrupting bug when un-indenting with ^d in insert mode
   and then deleting — could corrupt memory or crash.
6. Fixed display corruption and crashes on long lines when characters can
   render zero-width (tab width set to 0, zero-width placeholders).
7. Fixed a small memory leak when the autocomplete pattern asks for a capture
   group that doesn't exist.
8. Hardened redraw during multi-line insert so it can't reuse discarded
   line data.
9. Hardened :p-style range printing with character offsets so it can't
   leave discarded text referenced.
10. Hardened line freeing (undo history, closing buffers) so discarded lines
    are dropped from the render cache — protects against rare stale-text glitches
    or crashes.
11. Files that report a size of zero but do have content (e.g. /proc, /sys)
    now open with their contents instead of appearing empty.
12. Fixed stale permanent vi linenumber column used in redraw when switching
    to vi/ex prompt modes.

Patch2vi 1.1 changes:

1. Compat block bodies start with :m!. Mark ids restart per file per
   section and one run's sections share the buffers; a missed phase-1
   search fails instead of editing at a previous section's mark.
2. Failure reports name the section: FAIL lines and the >>> p2v FAIL
   banner carry the block's register (path:line:rN:mN), and QF2 repair
   placement reads the block's body from its own register.

Patch changes:

1. New threaded_redraw.sh:
   redraw on thread. Frame joined before next command. Needs pthreads.
   linewrap_v2.sh gained compat block for it.
2. linewrap_v1.sh
   and linewrap_v2.sh:
   elastic column. :lw no arg tracks terminal width, v1 rewraps buffer
   on resize, v2 rescale render.
3. linewrap_v2.sh:
   faster scroll redraw, vi_drawscroll redraws only entering/leaving rows.
4. New ex_marks.sh:
   letter mark ranges, :'a,'bs/foo/bar;
5. New nvi_status.sh:
   nvi style <^G> line.
6. patch2vi.sh: faster compat_order search, tree snapshot per step,
   one awk pass per level.
7. Division truncation fix: threaded_search.sh
8. New spell.sh:
   spell checking with an external speller that speaks the ispell pipe
   protocol.
9. visual.sh
   Implemented visual column conversion for block select (vb) fixing
   misalignment with multi width characters. Fixed [ ] mark offsets
   for visual block mode edits. Implemented adaptive chameleon cursor color.
10. stdin_pipe.sh
    Implicit compatibility with patches that use rely on reading stdin, e.g
    arrowkeys_insert.sh
11. Trivial bug fixing in other patches not worth mentioning.

Source commits:
master ef5aa79
manual 144c3db
patches 92dca3d
patch2vi 1a5a7a7
test 3dbcb11