Twenty Thirteen: Status format selector adjustment

[celloexpressions]

When testing the editor styles, I noticed that the .format-status p:first-child:before selector also styles blockquotes (because wordpress adds <p> tags inside blockquotes). It doesn't seem like this is the intended design, since first-child is used (and people shouldn't use blockquotes here anyway), but perhaps .post-format-status > p:first-child:before was the intention? That would result in only the single occurrence, instead of the potential for multiple if there is a blockquote for some reason. It would also prevent the styling from displaying if the entire status is in a blockquote, though.

Current:

Proposed:

(by the way, the differing widths are an editor style bug).

[celloexpressions]

Add direct child selector

[obenland]

+1

[nacin]

In 24657:

Twenty Thirteen: Use the child selector when styling paragraphs in a status post. props celloexpressions, fixes #24676.