'song so fit' replaceAll: $s with: $t
"=> 'tong to fit' "

'How now brown cow?' copyReplaceAll: 'ow' with: 'ello'
"=> 'Hello nello brellon cello?' "

'File asFile Files File''s File' copyReplaceTokens: 'File' with: 'Snick'
"=> 'Snick asFile Files Snick''s Snick' "