wp_html_excerpt() output has changed

[markjaquith]

Unit test failure due to [24214]:

1) Tests_Formatting_HtmlExcerpt::test_entities
Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-'Baba '
+'Baba'

It looks like a trim() got added to wp_html_excerpt() output.

What should change, the function or the test?

[SergeyBiryukov]

In 1282/tests:

Update wp_html_excerpt() test to reflect the change in [WP24214]. fixes #24311.