Adjust default latex template to improve citeproc output.

- Add a strut to avoid inconsistencies in spacing.
- Remove a break at the end of CSLRightInline to avoid
  inconsistencies in spacing. It shouldn't be necessary
  because the paragraph should extend to the right margin.

See #9058.

data/templates/default.latex

@@ -365,8 +365,8 @@ $if(csl-refs)$
  {\end{list}}
 \usepackage{calc}
 \newcommand{\CSLBlock}[1]{\hfill\break#1\hfill\break}
-\newcommand{\CSLLeftMargin}[1]{\parbox[t]{\csllabelwidth}{#1}}
-\newcommand{\CSLRightInline}[1]{\parbox[t]{\linewidth - \csllabelwidth}{#1}\break}
+\newcommand{\CSLLeftMargin}[1]{\parbox[t]{\csllabelwidth}{\strut #1 \strut}}
+\newcommand{\CSLRightInline}[1]{\parbox[t]{\linewidth - \csllabelwidth}{\strut #1 \strut}}
 \newcommand{\CSLIndent}[1]{\hspace{\cslhangindent}#1}
 $endif$
 $if(lang)$