Fix sphinx-doc#4206: latex: reST label between paragraphs loses parag…

…raph break

CHANGES

@@ -20,6 +20,8 @@ Features added
 Bugs fixed
 ----------
 
+* #4206: latex: reST label between paragraphs loses paragraph break
+
 Testing
 --------
 

sphinx/writers/latex.py

@@ -1919,6 +1919,12 @@ def add_target(id):
             # will be generated differently
             if id.startswith('index-'):
                 return
+
+            # insert blank line, if the target follows a paragraph node
+            index = node.parent.index(node)
+            if index > 0 and isinstance(node.parent[index - 1], nodes.paragraph):
+                self.body.append('\n')
+
             # do not generate \phantomsection in \section{}
             anchor = not self.in_title
             self.body.append(self.hypertarget(id, anchor=anchor))