LaTeX writer: better handling of line breaks in simple tables.

Now we also handle the case where they're embedded in other
elements, e.g. spans. Closes #7272.

src/Text/Pandoc/Writers/LaTeX/Table.hs

@@ -219,9 +219,7 @@ footRows (Ann.TableFoot _attr rows) = map headerRowCells rows
 -- we need to go to some lengths to get line breaks working:
 -- as LineBreak bs = \vtop{\hbox{\strut as}\hbox{\strut bs}}.
 fixLineBreaks :: Block -> Block
-fixLineBreaks (Para ils)  = Para $ fixLineBreaks' ils
-fixLineBreaks (Plain ils) = Plain $ fixLineBreaks' ils
-fixLineBreaks x           = x
+fixLineBreaks = walk fixLineBreaks'
 
 fixLineBreaks' :: [Inline] -> [Inline]
 fixLineBreaks' ils = case splitBy (== LineBreak) ils of

test/command/7272.md

@@ -0,0 +1,24 @@
+```
+% pandoc -t latex -f html
+<table>
+  <tbody>
+    <tr>
+      <td>
+        <span>
+          text
+          <br />
+          text2
+        </span>
+      </td>
+    </tr>
+  </tbody>
+</table>
+^D
+\begin{longtable}[]{@{}
+  >{\raggedright\arraybackslash}p{(\columnwidth - 0\tabcolsep) * \real{1.00}}@{}}
+\toprule
+\endhead
+{\vtop{\hbox{\strut  text}\hbox{\strut text2 }}} \\
+\bottomrule
+\end{longtable}
+```