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Hello world! </pre>
=={{header|sed}}==
There are no variables in ''sed'', just two distinct locations for storing a string: The "pattern space" and the "hold space".
The pattern space contains the current input line. With the <code>h</code> command, it is copied to the hold space. Then, the <code>s</code> command appends a string literal to the pattern space:
<syntaxhighlight lang="sed">h
s/$/String Literal/</syntaxhighlight>
If necessary, the content of both spaces could be exchanged by a final <code>x</code> command.
=={{header|Seed7}}==
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