refactor: texinfo: Remove CR char from output

The CR character was added for readability of output.  But it makes the
texinfo writer a bit complicated.  This removes it from output to keep
our code simple (reducing conditions).

sphinx/writers/texinfo.py

@@ -765,12 +765,10 @@ def visit_title_reference(self, node: Element) -> None:
     # -- Blocks
 
     def visit_paragraph(self, node: Element) -> None:
-        if not self.in_footnote:
-            self.body.append('\n')
+        self.body.append('\n')
 
     def depart_paragraph(self, node: Element) -> None:
-        if not self.in_footnote:
-            self.body.append('\n')
+        self.body.append('\n')
 
     def visit_block_quote(self, node: Element) -> None:
         self.body.append('\n@quotation\n')

tests/test_build_texinfo.py

@@ -119,7 +119,7 @@ def test_texinfo_footnote(app, status, warning):
     app.builder.build_all()
 
     output = (app.outdir / 'python.texi').read_text()
-    assert 'First footnote: @footnote{First}' in output
+    assert 'First footnote: @footnote{\nFirst\n}' in output
 
 
 @pytest.mark.sphinx('texinfo')