RFR: 8285452: Support new API to replace a file content using FileUtils.java [v3]

[Roger Riggs]

On Fri, 22 Apr 2022 14:35:14 GMT, Sibabrata Sahoo <ssahoo at openjdk.org> wrote:

>> A new API to support replacing selective lines with desired content.
>
> Sibabrata Sahoo has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update FileUtils.java

Can you elaborate on the use case, what tests would it be used in?

The hardcoded `from` and `to` seem very rigid and require knowledge of the exact format. 
That might lead to very fragile tests.

Is this equivalent to looking for a substring aka `String.contains(xxx)` of the input file to replace (with line ending normalization)?

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PR: https://git.openjdk.java.net/jdk/pull/8360