Restrict fix for #204 to HTML only

Replacing newlines with spaces in paragraphs for other output leads to
missing line breaks and incorrect output.

Author: drbrain

lib/rdoc/markup/paragraph.rb

@@ -21,7 +21,7 @@ def text hard_break = ''
       else
         part
       end
-    end.join.gsub(/\r?\n/, ' ')
+    end.join
   end
 
 end

lib/rdoc/markup/to_html.rb

@@ -176,6 +176,7 @@ def accept_block_quote block_quote
   def accept_paragraph paragraph
     @res << "\n<p>"
     text = paragraph.text @hard_break
+    text = text.gsub(/\r?\n/, ' ')
     @res << wrap(to_html(text))
     @res << "</p>\n"
   end

test/test_rdoc_markup_to_html.rb

@@ -389,6 +389,14 @@ def test_accept_heading_pipe
     assert_equal "\n<h1 id=\"label-Hello\">Hello</h1>\n", @to.res.join
   end
 
+  def test_accept_paragraph_newline
+    @to.start_accepting
+
+    @to.accept_paragraph para("hello\n", "world\n")
+
+    assert_equal "\n<p>hello world</p>\n", @to.res.join
+  end
+
   def test_accept_verbatim_parseable
     verb = @RM::Verbatim.new("class C\n", "end\n")