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Mention that <(...) refers to process substitution.
This is a replacement for #465.
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@@ -142,7 +142,7 @@ Notes:
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- Brace expansion using `{`...`}` can reduce having to re-type similar text and automate combinations of items. This is helpful in examples like `mv foo.{txt,pdf} some-dir` (which moves both files), `cp somefile{,.bak}` (which expands to `cp somefile somefile.bak`) or `mkdir -p test-{a,b,c}/subtest-{1,2,3}` (which expands all possible combinations and creates a directory tree).
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- The output of a command can be treated like a file via `<(some command)`. For example, compare local `/etc/hosts` with a remote one:
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- The output of a command can be treated like a file via `<(some command)` (known as process substitution). For example, compare local `/etc/hosts` with a remote one:
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```sh
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diff /etc/hosts <(ssh somehost cat /etc/hosts)
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```
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