Fix scala#72 XMLEventReader does not handle ' properly

	* src/main/scala/scala/xml/Utility.scala: Uncomment apos in
	Escapes map.
	(escape): Add case for apos.

	* src/test/scala/scala/xml/pull/XMLEventReaderTest.scala (entityRefTest):
	Unit test from Fehmi Can Saglam <fehmican.saglam@gmail.com>

src/main/scala/scala/xml/Utility.scala

@@ -97,13 +97,11 @@ object Utility extends AnyRef with parsing.TokenTests {
       "lt" -> '<',
       "gt" -> '>',
       "amp" -> '&',
-      "quot" -> '"'
-    // enigmatic comment explaining why this isn't escaped --
-    // is valid xhtml but not html, and IE doesn't know it, says jweb
-    // "apos"  -> '\''
+      "quot" -> '"',
+      "apos"  -> '\''
     )
     val escMap = pairs map { case (s, c) => c -> ("&%s;" format s) }
-    val unescMap = pairs ++ Map("apos" -> '\'')
+    val unescMap = pairs
   }
   import Escapes.{ escMap, unescMap }
 
@@ -123,6 +121,7 @@ object Utility extends AnyRef with parsing.TokenTests {
         case '>'  => s.append("&gt;")
         case '&'  => s.append("&amp;")
         case '"'  => s.append("&quot;")
+        case '\'' => s.append("&apos;")
         case '\n' => s.append('\n')
         case '\r' => s.append('\r')
         case '\t' => s.append('\t')

src/test/scala/scala/xml/UtilityTest.scala

@@ -35,7 +35,14 @@ class UtilityTest {
   def aposEscaping: Unit = {
     val z = <bar>''</bar>
     val z1 = z.toString
-    assertEquals("<bar>''</bar>", z1)
+    assertEquals("<bar>&apos;&apos;</bar>", z1)
+  }
+
+  @Test
+  def quotEscaping: Unit = {
+    val z = <bar>""</bar>
+    val z1 = z.toString
+    assertEquals("<bar>&quot;&quot;</bar>", z1)
   }
 
   @Test

src/test/scala/scala/xml/pull/XMLEventReaderTest.scala

@@ -2,7 +2,7 @@ package scala.xml
 package pull
 
 import org.junit.Test
-import org.junit.Assert.{assertFalse, assertTrue}
+import org.junit.Assert.{assertEquals,assertFalse, assertTrue}
 
 import scala.io.Source
 import scala.xml.parsing.FatalError
@@ -168,4 +168,30 @@ class XMLEventReaderTest {
     while(er.hasNext) er.next()
     er.stop()
   }
+
+  @Test
+  def entityRefTest: Unit = { // SI-7796
+    val source = Source.fromString("<text>&quot;&apos;&lt;&gt;&amp;</text>")
+    val er = new XMLEventReader(source)
+
+    assertTrue(er.next match {
+      case EvElemStart(_, "text", _, _) => true
+      case _ => false
+    })
+
+    val entities = Seq(
+      EvEntityRef("quot"),
+      EvEntityRef("apos"),
+      EvEntityRef("lt"),
+      EvEntityRef("gt"),
+      EvEntityRef("amp"))
+
+    assertEquals(entities, er.take(entities.size).toSeq)
+
+    assertTrue(er.next match {
+      case EvElemEnd(_, "text") => true
+      case _ => false
+    })
+    assertTrue(er.isEmpty)
+  }
 }