modified test and AztecParser to make <hr/> tag instead of <hr> in accordance to HTML and XHTML

Author: mzorz

app/src/androidTest/kotlin/org/wordpress/aztec/demo/tests/HistoryMixedTests.kt

@@ -24,7 +24,7 @@ class HistoryMixedTests : BaseHistoryTest() {
             "\t<li></li>\n" +
             "</ol>\n" +
             "\n" +
-            "<hr>\n" +
+            "<hr/>\n" +
             "\n" +
             "<ul>\n" +
             "\t<li>Unordered</li>\n" +

app/src/main/kotlin/org/wordpress/aztec/demo/MainActivity.kt

@@ -91,7 +91,7 @@ open class MainActivity : AppCompatActivity(),
         private val UNDERLINE = "<u style=\"color:lime\">Underline</u><br>"
         private val STRIKETHROUGH = "<s style=\"color:#ff666666\" class=\"test\">Strikethrough</s><br>" // <s> or <strike> or <del>
         private val ORDERED = "<ol style=\"color:green\"><li>Ordered</li><li>should have color</li></ol>"
-        private val LINE = "<hr>"
+        private val LINE = "<hr/>"
         private val UNORDERED = "<ul><li style=\"color:darkred\">Unordered</li><li>Should not have color</li></ul>"
         private val QUOTE = "<blockquote>Quote</blockquote>"
         private val LINK = "<a href=\"https://github.com/wordpress-mobile/WordPress-Aztec-Android\">Link</a><br>"

aztec/src/main/kotlin/org/wordpress/aztec/AztecParser.kt

@@ -473,7 +473,7 @@ class AztecParser(val plugins: List<IAztecPlugin> = ArrayList()) {
                         }
 
                 if (span is AztecHorizontalRuleSpan) {
-                    out.append("<${span.startTag}>")
+                    out.append("<${span.startTag}/>")
                     i = next
                 }
 

aztec/src/test/kotlin/org/wordpress/aztec/AttributeTest.kt

@@ -52,7 +52,7 @@ class AttributeTest {
         private val BIG = "<big b=\"B\">Big</big>"
         private val SMALL = "<small s=\"S\">Small</small>"
         private val P = "<p p=\"P\">Paragraph</p>"
-        private val LINE = "<hr h=\"H\">Ruler</hr>"
+        private val LINE = "<hr h=\"H\"/>"
         private val MIXED = HEADING + BOLD + ITALIC + UNDERLINE + STRIKETHROUGH + ORDERED +
                 UNORDERED + QUOTE + LINK + COMMENT + COMMENT_MORE + COMMENT_PAGE +
                 UNKNOWN + LIST + SUB + SUP + FONT + TT + BIG + SMALL + P

aztec/src/test/kotlin/org/wordpress/aztec/AztecToolbarTest.kt

@@ -960,11 +960,11 @@ class AztecToolbarTest {
     @Throws(Exception::class)
     fun orderedListMultiselectAlignment() {
         editText.fromHtml("<ol><li>item 1</li><li style=\"text-align: center;\">item 2</li></ol>" +
-                "<hr><ol><li>item 3</li><li>item 4</li></ol>")
+                "<hr/><ol><li>item 3</li><li>item 4</li></ol>")
 
         editText.setSelection(editText.text.indexOf("2"), editText.text.indexOf("3"))
         alignRightButton.performClick()
-        Assert.assertEquals("<ol><li>item 1</li><li style=\"text-align: right;\">item 2</li></ol><hr>" +
+        Assert.assertEquals("<ol><li>item 1</li><li style=\"text-align: right;\">item 2</li></ol><hr/>" +
                 "<ol><li style=\"text-align: right;\">item 3</li><li>item 4</li></ol>",
                 editText.toHtml())
     }

aztec/src/test/kotlin/org/wordpress/aztec/ClipboardTest.kt

@@ -26,7 +26,7 @@ class ClipboardTest {
     private val UNDERLINE = "<u>Underline</u><br>"
     private val STRIKETHROUGH = "<s class=\"test\">Strikethrough</s>" // <s> or <strike> or <del>
     private val ORDERED = "<ol><li>Ordered</li><li></li></ol>"
-    private val LINE = "<hr>"
+    private val LINE = "<hr/>"
     private val UNORDERED = "<ul><li>Unordered</li><li></li></ul>"
     private val QUOTE = "<blockquote>Quote</blockquote>"
     private val LINK = "<a href=\"https://github.com/wordpress-mobile/WordPress-Aztec-Android\">Link</a><br>"