xterm+256color2 is preferred over xterm+256color

TERMS.md

@@ -20,7 +20,7 @@ implementation of block-drawing characters, or relies on the font.
 | Linux console | ✔ | ✔ | N/A | `TERM=linux` `COLORTERM=24bit` | 8 (512 glyph fonts) or 16 (256 glyph fonts) colors max, but RGB values are downsampled to a 256-index palette. See below. |
 | FBterm | | ? | ? | `TERM=fbterm` | 256 colors, no RGB color. |
 | kmscon | | ? | ? | `TERM=xterm-256color` | No RGB color AFAICT, nor any distinct terminfo entry. |
-| XTerm | | ✔ |🗴|`TERM=xterm-256color` `COLORTERM=24bit` | See note about DirectColor. Must configure with `--enable-direct-color`. `TERM=xterm-direct` seems to have the undesirable effect of mapping low RGB values to a palette; I don't yet understand this well. The problem is not seen with the specified configuration. Sixel support when built with `--enable-sixel-graphics` and run in vt340 mode. |
+| XTerm | | ✔ |🗴|`TERM=xterm+256color2` `COLORTERM=24bit` | See note about DirectColor. Must configure with `--enable-direct-color`. `TERM=xterm-direct` seems to have the undesirable effect of mapping low RGB values to a palette; I don't yet understand this well. The problem is not seen with the specified configuration. Sixel support when built with `--enable-sixel-graphics` and run in vt340 mode. |
 | XFCE4 Terminal | ✔ | ✔ |? |`TERM=xfce` `COLORTERM=24bit` | No `xfce-direct` variant exists. |
 | Gnome Terminal | 🗴 | ✔ |? |`TERM=gnome` `COLORTERM=24bit` | `ccc` support *is* available when run with `vte-256color`. |
 | Konsole | 🗴 | ✔ |? | `TERM=konsole-direct` | |