changelog: fix up formatting

CHANGELOG.md

@@ -1,16 +1,18 @@
 This document attempts to list user-visible changes and any major internal
-rearrangements of Notcurse.
+rearrangements of Notcurses.
 
-* 1.2.5 (not yet released)
-** Add ncplot, with support for sliding-windowed horizontal histograms.
-** gradient, polyfill, ncplane_format() and ncplane_stain() all now return the
+* 1.2.6 (not yet released)
+
+* 1.2.5
+  * Add ncplot, with support for sliding-windowed horizontal histograms.
+  * gradient, polyfill, ncplane_format() and ncplane_stain() all now return the
    number of cells written on success. Failure still sees -1 returned.
-** `ncvisual_render()` now returns the number of cells emitted on success, as
+  * `ncvisual_render()` now returns the number of cells emitted on success, as
     opposed to 0. Failure still sees -1 returned.
-** `ncvisual_render()` now interprets length parameters of -1 to mean "to the
+  * `ncvisual_render()` now interprets length parameters of -1 to mean "to the
    end along this axis", and no longer interprets 0 to mean this. 0 now means
    "a length of 0", resulting in a zero-area rendering.
-** `notcurses_at_yx()` no longer accepts a `cell*` as its last parameter.
+  * `notcurses_at_yx()` no longer accepts a `cell*` as its last parameter.
    Instead, it accepts a `uint32_t*` and a `uint64_t*`, and writes the
    attribute and channels to these parameters. This was done because the
    `gcluster` field of the `cell*` was always set to 0, which was surprising
@@ -18,5 +20,5 @@ rearrangements of Notcurse.
    value. https://github.com/dankamongmen/notcurses/issues/410
 
 * 1.2.4 2020-03-24
-** Add ncmultiselector
-** Add `ncdirect_cursor_enable()` and `ncdirect_cursor_disable()`.
+  * Add ncmultiselector
+  * Add `ncdirect_cursor_enable()` and `ncdirect_cursor_disable()`.

doc/release-checklist.md

@@ -1,3 +1,4 @@
+* Finalize CHANGELOG.md
 * `for i in CMakeLists.txt doc/Doxyfile doc/FreeBSD-Makefile doc/man/man*/* doc/man/index.html python/setup.py rust/*/Cargo.toml rust/libnotcurses-sys/build.rs ; do sed -i -e "s/$OLDVERSION/$VERSION/g" $i ; done`
 * Finalize Debian changelog with `dch -r`
 * git commit -a -m v$VERSION