Examples using... strings.ReplaceAll()
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ReplaceAll returns a copy of the string s with all
non-overlapping instances of old replaced by new.
If old is empty, it matches at the beginning of the string
and after each UTF-8 sequence, yielding up to k+1 replacements
for a k-rune string.
Fprint "pretty-prints" an AST node to output.
It calls Config.Fprint with default settings.
Note that gofmt uses tabs for indentation but spaces for alignment;
use format.Node (package go/format) for output that matches gofmt.