Add translate="no" attribute to code and pre elements

This commit adds the `translate="no"` attribute to both inline code elements and code blocks to prevent machine translation tools from attempting to translate code
snippets.

Changes include:
1. Added `translate="no"` attribute to code blocks in block_listing.html.erb
2. Added `translate="no"` attribute to inline code elements in inline_quoted.html.erb
3. Added comprehensive tests to verify the attribute is correctly applied:
   - Test for inline code elements verifies the attribute is present on <code> tags
   - Test for code blocks verifies the attribute is present on <pre> tags with data-type="programlisting"

Author: nadamsoreilly

htmlbook/block_listing.html.erb

@@ -1,2 +1,2 @@
 <%#encoding:UTF-8%>
-<pre<%= @id && %( id="#{@id}") %> data-type="programlisting"<%= attr?('language') ? %( data-code-language="#{attr 'language'}") : nil %><% if (attr 'linenums') == "linenums" %> data-line-numbering="numbered" <% end %><%= attr?('role') ? %( class="#{attr 'role'}") : nil %><%= attr?('data-executable') ? %( data-executable="#{attr 'data-executable'}") : nil %>><%= content %></pre>
+<pre<%= @id && %( id="#{@id}") %> translate="no" data-type="programlisting"<%= attr?('language') ? %( data-code-language="#{attr 'language'}") : nil %><% if (attr 'linenums') == "linenums" %> data-line-numbering="numbered" <% end %><%= attr?('role') ? %( class="#{attr 'role'}") : nil %><%= attr?('data-executable') ? %( data-executable="#{attr 'data-executable'}") : nil %>><%= content %></pre>

htmlbook/inline_quoted.html.erb

@@ -3,7 +3,7 @@ class_attr = (style_class = role) ? %( class="#{style_class}") : nil
 case @type
 when :emphasis %><em<%= attr?('role') ? %( #{attr 'role'}) : nil %>><%= @text %></em><%
 when :strong %><strong<%= attr?('role') ? %( #{attr 'role'}) : nil %>><%= @text %></strong><%
-when :monospaced %><code<%= attr?('role') ? %( #{attr 'role'}) : nil %>><%= @text %></code><%
+when :monospaced %><code translate="no"<%= attr?('role') ? %( #{attr 'role'}) : nil %>><%= @text %></code><%
 when :superscript %><sup<%= attr?('role') ? %( #{attr 'role'}) : nil %>><%= @text %></sup><%
 when :subscript %><sub<%= attr?('role') ? %( #{attr 'role'}) : nil %>><%= @text %></sub><%
 when :double %><%= class_attr ? %(<span#{class_attr}>&#8220;#{@text}&#8221;</span>) : %(&#8220;#{@text}&#8221;) %><%

spec/htmlbook_spec.rb

@@ -277,6 +277,18 @@
 		html.xpath("//pre[@data-type='programlisting']").text.should == "Hello world"
 	end
 
+	it "should add translate='no' attribute to code blocks" do
+		html = Nokogiri::HTML(convert("
+[source, ruby]
+----
+def hello
+  puts 'Hello, world!'
+end
+----
+"))
+		html.xpath("//pre[@data-type='programlisting']/@translate").text.should == "no"
+	end
+
 	# Tests block_literal template - first markup style
 	it "should convert literal blocks" do
 		html = Nokogiri::HTML(convert("
@@ -934,6 +946,11 @@
 		html.xpath("//p/strong/code").text.should == "userinput"
 	end
 
+	it "should add translate='no' attribute to inline code elements" do
+		html = Nokogiri::HTML(convert("This para has some ++inline code++ in it."))
+		html.xpath("//p/code[1]/@translate").text.should == "no"
+	end
+
 	# Tests math in inline_quoted template
 	it "should convert inline latexmath equations with dollar sign delimeters to use standard delimiters" do
 		html = Nokogiri::HTML(convert("The Pythagorean Theorem is latexmath:[$a^2 + b^2 = c^2$]"))