In Visual Editor edit screen templates that produce a single line of displayed text (regardless of the length of that line) do not wrap on word boundaries.

Steps to reproduce:

1. Insert a picture or other right-aligned object that text should wrap around.
2. Transclude a template that produces a single line of text. {{EW charity|123456|This charity has got a long name to make it easy to test this bug}} is an example
3. Reduce the width of your browser window until the text produced by the template is longer than the avaialble space between the left margin and the picture.

Expected behaviour: The last word(s) of the text produced by the template wraps onto a second line.
Actual behaviour: The entire line moves to below the picture as a single unit.

Any template that produces two or more lines of displayed text (on an infinitely wide window) does not exhibit this behaviour and wraps correctly. For example:

"Long text<br>1" wraps correctly

"Long text
1"
"Long text<br>" and
"Long text<br>
<!--hidden-->" all exhibit this bug.

Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=52445
https://bugzilla.wikimedia.org/show_bug.cgi?id=50395