Help:Lint errors/multiple-unclosed-formatting-tags

Problem
There are two unrelated instances where this category is emitted.

Scenario 1: Accumulated effect of small and big tags
When more than one or  tag is left unclosed on a page, the effects of those small and big tags accumulate on a page. See [ https://it.wikipedia.org/wiki/Hubert_H._Humphrey_Metrodome?oldid=93017491&action=parsermigration-edit#Note this revision on Italian Wikipedia] for an example of a particularly bad case with 13 unclosed small tags.

Scenario 2: Incorrect use of instead of
Sometimes, editors accidentally use an opening tag instead of a closing tag. For example (Ex: [ https://it.wikipedia.org/w/index.php?title=Aiuto:Lua&oldid=93082702#Richiamare_un_modulo_Lua this revision on itwiki])

Solution
In both the scenarios, close the corresponding unclosed tag.

Affected tags
Note that these scenarios only affect [ https://www.w3.org/TR/html51/syntax.html#formatting-element-tags formatting tags]: ,,  ,  ,  ,  ,  ,  ,  ,  ,  ,  ,  ,.

Caveats

 * 1) This error is expected to not be very common.
 * 2) There can be false positives if the unclosed small / big tags are in different cells of a table.