fix typo when skipping a rule with containing values with em unit (fixes #16)

Author: rbri

src/main/javacc/CSS3Parser.jj

@@ -2282,7 +2282,7 @@ String skipUnit() {
 JAVACODE
 void appendUnit(Token t, StringBuilder sb) {
     if (t.kind == EMS) {
-      sb.append("ems");
+      sb.append("em");
       return;
     }
     if (t.kind == REM) {

src/test/java/com/gargoylesoftware/css/dom/CSSUnknownRuleImplTest.java

@@ -57,6 +57,32 @@ public void setCssText() throws Exception {
 
     }
 
+    /**
+     * @throws Exception if any error occurs
+     */
+    @Test
+    public void keyframes() throws Exception {
+        final CSSUnknownRuleImpl value = parseUnknownRule("@keyframes load5 {0%, 100% {"
+                + "box-shadow: 0em -2.6em 0em 0em #000000, 1.8em -1.8em 0 0em rgba(0, 0, 0, 0.2), "
+                + "2.5em 0em 0 0em rgba(0, 0, 0, 0.2), 1.75em 1.75em 0 0em rgba(0, 0, 0, 0.2), "
+                + "0em 2.5em 0 0em rgba(0, 0, 0, 0.2), -1.8em 1.8em 0 0em rgba(0, 0, 0, 0.2), "
+                + "-2.6em 0em 0 0em rgba(0, 0, 0, 0.5), -1.8em -1.8em 0 0em rgba(0, 0, 0, 0.7);"
+                + "}");
+
+        assertEquals("@keyframes load5 {0%, 100% {"
+                + "box-shadow: 0em -2.6em 0em 0em #000000, 1.8em -1.8em 0 0em rgba(0, 0, 0, 0.2), "
+                + "2.5em 0em 0 0em rgba(0, 0, 0, 0.2), 1.75em 1.75em 0 0em rgba(0, 0, 0, 0.2), "
+                + "0em 2.5em 0 0em rgba(0, 0, 0, 0.2), -1.8em 1.8em 0 0em rgba(0, 0, 0, 0.2), "
+                + "-2.6em 0em 0 0em rgba(0, 0, 0, 0.5), -1.8em -1.8em 0 0em rgba(0, 0, 0, 0.7);"
+                + "}", value.getCssText());
+        assertEquals("@keyframes load5 {0%, 100% {"
+                + "box-shadow: 0em -2.6em 0em 0em #000000, 1.8em -1.8em 0 0em rgba(0, 0, 0, 0.2), "
+                + "2.5em 0em 0 0em rgba(0, 0, 0, 0.2), 1.75em 1.75em 0 0em rgba(0, 0, 0, 0.2), "
+                + "0em 2.5em 0 0em rgba(0, 0, 0, 0.2), -1.8em 1.8em 0 0em rgba(0, 0, 0, 0.2), "
+                + "-2.6em 0em 0 0em rgba(0, 0, 0, 0.5), -1.8em -1.8em 0 0em rgba(0, 0, 0, 0.7);"
+                + "}", value.toString());
+    }
+
     /**
      * @throws Exception if any error occurs
      */