Do not omit empty indent string when pretty printing. Closes #59

src/XMLBuilder.coffee

@@ -63,8 +63,8 @@ module.exports = class XMLBuilder
   # `options.newline` newline sequence for pretty print
   toString: (options) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
 
     r = ''
     r += @xmldec.toString options if @xmldec?

src/XMLCData.coffee

@@ -30,8 +30,8 @@ module.exports = class XMLCData extends XMLNode
   # `options.newline` newline sequence for pretty print
   toString: (options, level) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
     level or= 0
 
     space = new Array(level + 1).join(indent)

src/XMLComment.coffee

@@ -30,8 +30,8 @@ module.exports = class XMLComment extends XMLNode
   # `options.newline` newline sequence for pretty print
   toString: (options, level) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
     level or= 0
 
     space = new Array(level + 1).join(indent)

src/XMLDTDAttList.coffee

@@ -51,8 +51,8 @@ module.exports = class XMLDTDAttList
   # `options.newline` newline sequence for pretty print
   toString: (options, level) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
     level or= 0
 
     space = new Array(level + 1).join(indent)

src/XMLDTDElement.coffee

@@ -36,8 +36,8 @@ module.exports = class XMLDTDElement
   # `options.newline` newline sequence for pretty print
   toString: (options, level) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
     level or= 0
 
     space = new Array(level + 1).join(indent)

src/XMLDTDEntity.coffee

@@ -54,8 +54,8 @@ module.exports = class XMLDTDEntity
   # `options.newline` newline sequence for pretty print
   toString: (options, level) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
     level or= 0
 
     space = new Array(level + 1).join(indent)

src/XMLDTDNotation.coffee

@@ -36,8 +36,8 @@ module.exports = class XMLDTDNotation
   # `options.newline` newline sequence for pretty print
   toString: (options, level) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
     level or= 0
 
     space = new Array(level + 1).join(indent)

src/XMLDeclaration.coffee

@@ -45,8 +45,8 @@ module.exports = class XMLDeclaration extends XMLNode
   # `options.newline` newline sequence for pretty print
   toString: (options, level) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
     level or= 0
 
     space = new Array(level + 1).join(indent)

src/XMLDocType.coffee

@@ -148,8 +148,8 @@ module.exports = class XMLDocType
   # `options.newline` newline sequence for pretty print
   toString: (options, level) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
     level or= 0
 
     space = new Array(level + 1).join(indent)

src/XMLElement.coffee

@@ -118,8 +118,8 @@ module.exports = class XMLElement extends XMLNode
   # `options.newline` newline sequence for pretty print
   toString: (options, level) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
     level or= 0
 
     space = new Array(level + 1).join(indent)

src/XMLProcessingInstruction.coffee

@@ -31,8 +31,8 @@ module.exports = class XMLProcessingInstruction
   # `options.newline` newline sequence for pretty print
   toString: (options, level) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
     level or= 0
 
     space = new Array(level + 1).join(indent)

src/XMLRaw.coffee

@@ -30,8 +30,8 @@ module.exports = class XMLRaw extends XMLNode
   # `options.newline` newline sequence for pretty print
   toString: (options, level) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
     level or= 0
 
     space = new Array(level + 1).join(indent)

src/XMLText.coffee

@@ -30,8 +30,8 @@ module.exports = class XMLText extends XMLNode
   # `options.newline` newline sequence for pretty print
   toString: (options, level) ->
     pretty = options?.pretty or false
-    indent = options?.indent or '  '
-    newline = options?.newline or '\n'
+    indent = options?.indent ? '  '
+    newline = options?.newline ? '\n'
     level or= 0
 
     space = new Array(level + 1).join(indent)

test/createxml.coffee

@@ -123,6 +123,47 @@ vows
                       """
                 assert.strictEqual topic.end({ pretty: true, indent: '    ' }), xml
 
+        'Pretty printing with empty indent':
+            topic: () ->
+                xmlbuilder.create('root')
+                    .ele('xmlbuilder', {'for': 'node-js' })
+                        .com('CoffeeScript is awesome.')
+                        .nod('repo', {'type': 'git'}, 'git://github.com/oozcitak/xmlbuilder-js.git')
+                        .up()
+                    .up()
+                    .ele('test', {'escaped': 'chars <>\'"&\t\n\r'}, 'complete 100%<>\'"&\t\n\r')
+                    .up()
+                    .ele('cdata')
+                        .cdata('<test att="val">this is a test</test>\nSecond line')
+                    .up()
+                    .ele('raw')
+                        .raw('&<>&')
+                        .up()
+                    .ele('atttest', { 'att': 'val' }, 'text')
+                        .up()
+                    .ele('atttest', 'text')
+                        .att('att', () -> 'val')
+
+            'resulting XML': (topic) ->
+                xml = """
+                      <?xml version="1.0"?>
+                      <root>
+                      <xmlbuilder for="node-js">
+                      <!-- CoffeeScript is awesome. -->
+                      <repo type="git">git://github.com/oozcitak/xmlbuilder-js.git</repo>
+                      </xmlbuilder>
+                      <test escaped="chars &lt;>\'&quot;&amp;&#x9;&#xA;&#xD;">complete 100%&lt;&gt;\'"&amp;\t\n&#xD;</test>
+                      <cdata>
+                      <![CDATA[<test att="val">this is a test</test>
+                      Second line]]>
+                      </cdata>
+                      <raw>&<>&</raw>
+                      <atttest att="val">text</atttest>
+                      <atttest att="val">text</atttest>
+                      </root>
+                      """
+                assert.strictEqual topic.end({ pretty: true, indent: '' }), xml
+
         'Short form with attributes':
             topic: () ->
                 xmlbuilder.create('root')