When a tag is nested inside another tag with the same name and the second instance is not preceded by a whitespace, the tag is incorrectly ended there in the rendered HTML:

<tt>outer <tt>inner</tt></tt>

is rendered correctly as

<tt>outer <tt>inner</tt></tt>

Whereas

<tt>outer<tt>inner</tt></tt>

is rendered as

<tt>outer</tt>inner

The same issue is present with other formatting tags, such as <b>, <i> and <em>.

Version: 1.17.x
Severity: normal
URL: http://en.wikipedia.org/wiki/Template_talk:Tlx#Nesting_tlx_results_in_inconsistent_formatting