Improve Javadoc for StringUtils.isBlank (closes apache/commons-lang#1…

[NoctisSolvane]

Improved Javadoc for 'isBlank' method:

• Added clearer description
• Included examples
• Added @SInCE tag
• Used proper formatting

Closes #1234

[garydgregory]

-1 not needed, it looks like change for the sake of change. Since tag now loose history.

[NoctisSolvane]

-1 not needed, it looks like change for the sake of change. Since tag now loose history.
Thank you for reviewing my changes.
You are right - the @SInCE tag could confuse history and wasn't necessary. I removed it.
Updated the PR with just the improved description, formatting and examples.
Happy to make any other adjustments. Thanks again.

[garydgregory]

-1 the changes are even worse, this is change for the sake of change.
I will close this PR unless you can show semantic changes without messing up the formatting.

[NoctisSolvane]

-1 the changes are even worse, this is change for the sake of change. I will close this PR unless you can show semantic changes without messing up the formatting.

Thank you for the honest feedback.

I understand now that my changes altered the formatting style too much and added unnecessary content. I will revert to a more minimal improvement that only explains the existing description without changing the original structure too much.

I will push the updated version shortly. If the changes aren't worth it, you are free to close the PR - I genuinely appreciate the opportunity to learn.

[garydgregory]

Closing: No further changes submitted.