Revert "Make page-break not configurable"

This reverts commit 0eb23efd44.

src/config.rs

@@ -592,11 +592,16 @@ impl HtmlConfig {
 pub struct Print {
     /// Whether print support is enabled.
     pub enable: bool,
+    /// Insert page breaks between chapters. Default: `true`.
+    pub page_break: bool,
 }
 
 impl Default for Print {
     fn default() -> Self {
-        Self { enable: true }
+        Self {
+            enable: true,
+            page_break: true,
+        }
     }
 }
 

src/renderer/html_handlebars/hbs_renderer.rs

@@ -56,7 +56,7 @@ impl HtmlHandlebars {
 
         let fixed_content =
             utils::render_markdown_with_path(&ch.content, ctx.html_config.curly_quotes, Some(path));
-        if !ctx.is_index {
+        if !ctx.is_index && ctx.html_config.print.page_break {
             // Add page break between chapters
             // See https://developer.mozilla.org/en-US/docs/Web/CSS/break-before and https://developer.mozilla.org/en-US/docs/Web/CSS/page-break-before
             // Add both two CSS properties because of the compatibility issue