Reworded message when a file edited with sed cannot be previewed

When Claude edits a file with sed, a command-line tool for changing text, Claude Code shows a preview of the change. If the existing file is not plain text in UTF-8, the most common text encoding, the message now says the file "is not UTF-8 text, so it cannot be previewed" instead of saying it is not valid UTF-8. The way the file's path is shown in that message has also changed.