Added method sectionTitleLevel4

src/main/java/io/github/robwin/markup/builder/AbstractMarkupDocBuilder.java

@@ -57,6 +57,10 @@ public abstract class AbstractMarkupDocBuilder implements MarkupDocBuilder {
         documentBuilder.append(markup).append(title).append(newLine);
     }
 
+    protected void sectionTitleLevel4(Markup markup, String title){
+        documentBuilder.append(markup).append(title).append(newLine);
+    }
+
     @Override
     public MarkupDocBuilder textLine(String text){
         documentBuilder.append(text).append(newLine);

src/main/java/io/github/robwin/markup/builder/MarkupDocBuilder.java

@@ -36,6 +36,8 @@ public interface MarkupDocBuilder {
 
     MarkupDocBuilder sectionTitleLevel3(String title);
 
+    MarkupDocBuilder sectionTitleLevel4(String title);
+
     MarkupDocBuilder textLine(String text);
 
     MarkupDocBuilder paragraph(String text);

src/main/java/io/github/robwin/markup/builder/MarkupDocBuilders.java

@@ -27,7 +27,7 @@ import io.github.robwin.markup.builder.markdown.MarkdownBuilder;
  */
 public final class MarkupDocBuilders {
 
-    private MarkupDocBuilders(){};
+    private MarkupDocBuilders(){}
 
     public static MarkupDocBuilder documentBuilder(MarkupLanguage markupLanguage){
         switch(markupLanguage){

src/main/java/io/github/robwin/markup/builder/asciidoc/AsciiDoc.java

@@ -34,6 +34,7 @@ public enum AsciiDoc implements Markup {
     SECTION_TITLE_LEVEL1("== "),
     SECTION_TITLE_LEVEL2("=== "),
     SECTION_TITLE_LEVEL3("==== "),
+    SECTION_TITLE_LEVEL4("===== "),
     BOLD("*"),
     ITALIC("_"),
     LIST_ENTRY("* "),

src/main/java/io/github/robwin/markup/builder/asciidoc/AsciiDocBuilder.java

@@ -60,6 +60,12 @@ public class AsciiDocBuilder extends AbstractMarkupDocBuilder {
         return this;
     }
 
+    @Override
+    public MarkupDocBuilder sectionTitleLevel4(String title){
+        sectionTitleLevel3(AsciiDoc.SECTION_TITLE_LEVEL4, title);
+        return this;
+    }
+
     @Override
     public MarkupDocBuilder paragraph(String text){
         paragraph(AsciiDoc.HARDBREAKS, text);

src/main/java/io/github/robwin/markup/builder/markdown/Markdown.java

@@ -32,6 +32,7 @@ public enum Markdown implements Markup {
     SECTION_TITLE_LEVEL1("## "),
     SECTION_TITLE_LEVEL2("### "),
     SECTION_TITLE_LEVEL3("#### "),
+    SECTION_TITLE_LEVEL4("##### "),
     BOLD("**"),
     ITALIC("*"),
     LIST_ENTRY("* ");

src/main/java/io/github/robwin/markup/builder/markdown/MarkdownBuilder.java

@@ -61,6 +61,12 @@ public class MarkdownBuilder extends AbstractMarkupDocBuilder
         return this;
     }
 
+    @Override
+    public MarkupDocBuilder sectionTitleLevel4(String title){
+        sectionTitleLevel3(Markdown.SECTION_TITLE_LEVEL4, title);
+        return this;
+    }
+
     @Override
     public MarkupDocBuilder paragraph(String text){
         paragraph(Markdown.HARDBREAKS, text);