alhudz opened a new pull request, #1732:
URL: https://github.com/apache/commons-lang/pull/1732
1. `containsAllWords` builds the per-word regex `.*\b<word>\b.*` and runs it
with `matches()`, but compiles it without `Pattern.DOTALL`, so `.` never
matches a line terminator.
2. `matches()` has to consume the whole input, so a word sitting on a
different line than the surrounding `.*` can reach is never found.
Repro: `WordUtils.containsAllWords("foo\nbar", "bar")`
Expected: `true` (`bar` is present as a whole word)
Actual: `false`
Fix: compile the pattern with `Pattern.DOTALL` so the leading and trailing
`.*` span line breaks. The `\b` anchors are unchanged, so single-line results
and the documented examples behave the same and no false positive is introduced.
The same regex is in `commons-text` `WordUtils.containsAllWords`.
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