Add unittests for whitespace handling in text node

Also expand/fix the test for line endings

unittests/newlines.svg

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+	
+
+<svg xmlns="http://www.w3.org/2000/svg"
+
+>
+
+
+
+     <!-- this file has pretty messed up formatting -->       <rect width="100" height="100"/>	
+  
<rect width="100" height="100"/>
+  <rect width="100" height="100"/>
+  
+  
+ 	
+  
+  
+  <rect width="100" height="100"/>
+                 <rect width="100" height="100"/>	
+  <rect width="100" height="100"/>            
+  
+  
+  
+  
+  
+  
+  <!-- we have mixed newline
+  characters, carriage returns
  and both of them
+  as well as tabs 	   		and spaces        
+  -->
+  
+  <rect width="100" height="100"/><rect width="100" height="100"/>   <rect width="100" height="100"/>
+  
+  <rect width="100" height="100"/>
<rect width="100" height="100"/>   <rect width="100" height="100"/>
+  
+	
+  
+		
+  
+  <rect width="100" height="100"/>		  	<rect width="100" height="100"/>
+  
+  
+</svg>
+
+
+
+
+
+<!-- OMG, really? -->

unittests/whitespace-important.svg

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg xmlns="http://www.w3.org/2000/svg">
- <text xml:space="preserve">This is some <tspan font-style="italic">messed-up</tspan> markup</text>
-</svg>

unittests/whitespace-nested.svg

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg xmlns="http://www.w3.org/2000/svg">
- <text xml:space="preserve"><tspan font-style="italic">Use <tspan font-style="bold">bold</tspan> text</tspan></text>
-</svg>

unittests/whitespace.svg

@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg">
+ <!-- basic tests -->
+ <text id="txt_a1">text1    text2</text> <!-- multiple spaces -->
+ <text id="txt_a2">text1	text2</text> <!-- tab -->
+ <text id="txt_a3" xml:space="default">text1    text2</text> <!-- multiple spaces -->
+ <text id="txt_a4" xml:space="default">text1	text2</text> <!-- tab -->
+ <text id="txt_a5" xml:space="preserve">text1    text2</text> <!-- multiple spaces -->
+ <text id="txt_a6" xml:space="preserve">text1	text2</text> <!-- tab -->
+
+ <!-- newlines -->
+ <text id="txt_b1">text1
+       text2</text>
+ <text id="txt_b2" xml:space="default">text1
+       text2</text>
+ <text id="txt_b3" xml:space="preserve">text1
+       text2</text>
+
+ <!-- inheritance -->
+ <text id="txt_c1" xml:space="preserve"><tspan>text1    text2</tspan></text>
+ <text id="txt_c2" xml:space="preserve"><tspan xml:space="default">text1    text2</tspan></text>
+ <text id="txt_c3" xml:space="default"><tspan xml:space="preserve">text1    text2</tspan></text>
+ <g xml:space="preserve"><text id="txt_c4">text1    text2</text></g>
+ <g xml:space="preserve"><text id="txt_c5" xml:space="default">text1    text2</text></g>
+ <g xml:space="default"><text id="txt_c6" xml:space="preserve">text1    text2</text></g>
+
+ <!-- important whitespace that must not be stripped -->
+ <text id="txt_d1">text1
+ text2</text>
+ <text id="txt_d2">text1 <tspan>tspan1</tspan> text2</text>
+ <text id="txt_d3">text1 <tspan>tspan1 <tspan>tspan2</tspan> text2</tspan></text>
+ 
+ <!-- whitespace must not be introduced -->
+ <text id="txt_e1">text1
+text2</text>
+ <text id="txt_e2">text1<tspan>tspan</tspan>text2</text>
+ <text id="txt_e3">text1
+<tspan>tspan</tspan>
+text2</text>
+</svg>