Updated text node comparer to use preserve whitespace by default on pre, script, and style tags.

Author: egil

docs/Strategies.md

@@ -259,12 +259,14 @@ To configure/override whitespace rules on a specific subtree in the comparison,
 </header>
 ```
 
-**Special case for `<pre>` elements:** The content of `<pre>` elements will always be treated as the `Preserve` option, even if whitespace option is globally set to `RemoveWhitespaceNodes` or `Normalize`. To override this, add a in-line `diff:whitespace` attribute to the `<pre>`-tag, e.g.:
+**Special case for `<pre>`, `<script>`, and `<style>` elements:** The content of `<pre>`, `<script>`, and `<style>` elements will always be treated as the `Preserve` option, even if whitespace option is globally set to `RemoveWhitespaceNodes` or `Normalize`. To override this, add a in-line `diff:whitespace` attribute to the tags, e.g.:
 
 ```html
 <pre diff:whitespace="RemoveWhitespaceNodes">...</pre>
 ```
 
+This should ensure that the meaning of the content in those tags doesn't change by default. To deal correctly with whitespace in `<style>` tags, use the [Style sheet text comparer](#style-sheet-text-comparer).
+
 #### Perform case-_insensitve_ text comparison
 To compare the text in two text nodes to each other using a case-insensitive comparison, call the `WithTextComparer(ignoreCase: true)` method on a `DiffBuilder` instance, e.g.:
 

tests/Strategies/TextNodeStrategies/TextNodeComparerTest.cs

@@ -138,7 +138,7 @@ public void Test005(string tag)
         public void Test006(string tag)
         {
             var sut = new TextNodeComparer(WhitespaceOption.Normalize);
-            var elm = ToComparisonSource("<{tag} diff:whitespace=\"normalize\">foo   bar</{tag}>");
+            var elm = ToComparisonSource($"<{tag} diff:whitespace=\"normalize\">foo   bar</{tag}>");
             var controlSource = new ComparisonSource(elm.Node.FirstChild, 0, elm.Path, ComparisonSourceType.Control);
             var testSource = ToComparisonSource("foo bar", ComparisonSourceType.Test);
             var comparison = new Comparison(controlSource, testSource);