LibPDF: Make Reader::dump_state a bit more readable

Author: https://github.com/mattco98
Commit: https://github.com/SerenityOS/serenity/commit/97cc4820879
Pull-request: https://github.com/SerenityOS/serenity/pull/7436
Reviewed-by: https://github.com/alimpfard

Userland/Libraries/LibPDF/Reader.h

@@ -126,23 +126,21 @@ public:
 #ifdef PDF_DEBUG
     void dump_state() const
     {
-        StringBuilder builder;
-        builder.append("Reader State Dump\n\n");
+        dbgln("Reader State (offset={} size={})", offset(), bytes().size());
 
-        size_t from = max(0ul, offset() - 10);
+        size_t from = max(0, static_cast<int>(offset()) - 10);
         size_t to = min(bytes().size() - 1, offset() + 10);
 
         for (auto i = from; i <= to; i++) {
             char value = static_cast<char>(bytes().at(i));
-            builder.appendff("{}: '{}' (value={:3d}) ", i, value, static_cast<u8>(value));
-            if (i == offset())
-                builder.appendff(" <<< current location, forwards={}", m_forwards);
-            builder.append('\n');
+            auto line = String::formatted("  {}: '{}' (value={:3d}) ", i, value, static_cast<u8>(value));
+            if (i == offset()) {
+                dbgln("{} <<< current location, forwards={}", line, m_forwards);
+            } else {
+                dbgln("{}", line);
+            }
         }
-        builder.append('\n');
-
-        auto str = builder.to_string();
-        dbgputstr(str.characters(), str.length());
+        dbgln();
     }
 #endif