IDE: Show type info and then doc in hover

Otherwise, we only see the docs at first glance when the docstring is
long, and we need to scroll to get to the type info (which is generally
a single line).

Author: Duhemm

language-server/src/dotty/tools/languageserver/DottyLanguageServer.scala

@@ -474,7 +474,7 @@ object DottyLanguageServer {
     val typeInfoHover = new lsp4j.MarkedString()
     typeInfoHover.setValue(typeInfo)
 
-    docHover.toList :+ typeInfoHover
+    typeInfoHover :: docHover.toList
   }
 
 

language-server/test/dotty/tools/languageserver/HoverTest.scala

@@ -12,7 +12,7 @@ class HoverTest {
   @Test def hoverOnClassShowsDoc: Unit = {
     code"""$m1 /** foo */ ${m2}class Foo $m3 $m4""".withSource
       .hover(m1 to m2, Nil)
-      .hover(m2 to m3, List("/** foo */", "Foo"))
+      .hover(m2 to m3, List("Foo", "/** foo */"))
       .hover(m3 to m4, Nil)
   }