Fixing issue 34: exclamations.

spyc.php

@@ -301,7 +301,7 @@ private function _dumpNode($key, $value, $indent, $previous_key = -1, $first_key
     // do some folding here, for blocks
     if (is_string ($value) && ((strpos($value,"\n") !== false || strpos($value,": ") !== false || strpos($value,"- ") !== false ||
       strpos($value,"*") !== false || strpos($value,"#") !== false || strpos($value,"<") !== false || strpos($value,">") !== false || strpos ($value, '  ') !== false ||
-      strpos($value,"[") !== false || strpos($value,"]") !== false || strpos($value,"{") !== false || strpos($value,"}") !== false) || strpos($value,"&") !== false ||
+      strpos($value,"[") !== false || strpos($value,"]") !== false || strpos($value,"{") !== false || strpos($value,"}") !== false) || strpos($value,"&") !== false || strpos($value, "!") === 0 ||
       substr ($value, -1, 1) == ':')
     ) {
       $value = $this->_doLiteralBlock($value,$indent);

tests/DumpTest.php

@@ -53,6 +53,19 @@ public function testDumpAmpersands() {
       $awaiting = "---\nsome: '&foo'\n";
       $this->assertEquals ($awaiting, $dump);
     }
+
+    public function testDumpExclamations() {
+      $dump = Spyc::YAMLDump(array ('some' => '!foo'));
+      $awaiting = "---\nsome: '!foo'\n";
+      $this->assertEquals ($awaiting, $dump);
+    }
+
+    public function testDumpExclamations2() {
+      $dump = Spyc::YAMLDump(array ('some' => 'foo!'));
+      $awaiting = "---\nsome: foo!\n";
+      $this->assertEquals ($awaiting, $dump);
+    }
+
 
     public function testDumpNumericHashes() {
       $dump = Spyc::YAMLDump(array ("titel"=> array("0" => "", 1 => "Dr.", 5 => "Prof.", 6 => "Prof. Dr.")));

tests/RoundTripTest.php

@@ -17,6 +17,10 @@ public function testNull() {
     public function testY() {
       $this->assertEquals (array ('x' => 'y'), roundTrip ('y'));
     }
+
+    public function testExclam() {
+      $this->assertEquals (array ('x' => '!yeah'), roundTrip ('!yeah'));
+    }
 
     public function test5() {
       $this->assertEquals (array ('x' => '5'), roundTrip ('5'));