zsh has added lots of little things to make life easier.
Example: secondary prompts show nesting level (user input shown in bold on this slide):
zsh$ for file in `find . -name '*.ps*' -print` for> do case "$file" in for case> *.ps) lpr $file ;; for case> *.ps.gz) zcat "$file" | lpr ;; for case> esac for> done zsh$
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