TEXTEDIT's prompt no longer reads "or or". Undo reverts the last edit made
in this TEXTEDIT, and Mode switches between Multiple (keep selecting) and
Single (end after one edit). At the command line and in scripts, MTEXT
takes one paragraph per input line until an empty line, instead of ending
after the first line and running the next one as a command. The Text
Editor window sends its contents and then Enter, so it still ends MTEXT.
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
