add plain text maker

src/app/browser/main/tab/page/content/text/gemini/reader.cpp

@@ -161,7 +161,7 @@ Glib::ustring Reader::make(
             continue;
         }
 
-        // Header
+        // Quote
         Glib::ustring quote;
 
         if (Line::Match::quote(line, quote))
@@ -177,10 +177,11 @@ Glib::ustring Reader::make(
 
         // @TODO other tags..
 
+        // Default
         pango.append(
-            line.append(
-                "\n"
-            ) // @TODO
+            Make::plain(
+                line
+            )
         );
     }
 
@@ -261,6 +262,17 @@ Glib::ustring Reader::Make::link(
     );
 }
 
+Glib::ustring Reader::Make::plain(
+    const Glib::ustring & TEXT
+) {
+    return Glib::ustring::sprintf(
+        "%s\n",
+        Glib::Markup::escape_text(
+            TEXT
+        )
+    );
+}
+
 Glib::ustring Reader::Make::quote(
     const Glib::ustring & TEXT
 ) {

src/app/browser/main/tab/page/content/text/gemini/reader.hpp

@@ -52,6 +52,10 @@ namespace app::browser::main::tab::page::content::text::gemini
                 const Glib::ustring & ALT
             );
 
+            static Glib::ustring plain(
+                const Glib::ustring & TEXT
+            );
+
             static Glib::ustring quote(
                 const Glib::ustring & TEXT
             );