The streaming zip pipeline was constructing AnonymizeTransformer first and
then assigning opt.filePath afterwards. AnonymizeTransformer determines
isText in its constructor from opt.filePath, so every entry was classified
as binary and passed through unchanged — the downloaded zip leaked the
original (un-anonymized) terms even though the web view scrubbed them.
Pass filePath via the constructor so isText is computed correctly.
Fixes#342, #349.
Wrapping every user term as `\b${term}\b` silently dropped matches when
the term started or ended with a non-word char (e.g. `@tdurieux`,
`@author .*`), because JS `\b` only fires at a word/non-word transition.
Replace with `withWordBoundaries()`, which only emits `\b` on the side
where the term has a word-char edge.
Fixes#175, #249.
tdurieux