What this snippet does
s/old/new/g replaces every occurrence on each line and prints the result.
Expected output
host=127.0.0.1
Why practise typing this
Typing text processing code builds muscle memory for the symbols and indentation Linux uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.
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