*converter: don't exit --info right after Doxygen config snippet marker.

With the following invocation

    magnum-sceneconverter --info-importer -I GltfImporter \
        -i customSceneFieldTypes/foo=Int

the newly-added option wasn't visible in the configuration printout
because the printer exited right once encountering the Doxygen
[configuration_] snippet marker in the file, and the option got added
after it. Now it's continuing after the marker and the newly-added
option is visible.

src/Magnum/Trade/Implementation/converterUtilities.h

@@ -95,12 +95,11 @@ void printPluginConfigurationInfo(Debug& d, const Utility::ConfigurationGroup& c
             d << Debug::resetColor;
         } else {
             /* Configuration contents are delimited by these markers in order
-               to include them in Doxygen-generated docs. If we reach them,
+               to include them in Doxygen-generated docs. Newly added values
-               it's the end of the (public) configuration values. Don't print
+               will however appear *after* these markers so we can't just
-               them, don't print even the last newline, and exit. */
+               return here. */
-            if(i.second() == "# [configuration_]"_s) {
+            if(i.second() == "# [configuration_]"_s)
-                return;
+                continue;
-            }
 
             /* Print leading space only if there's actually something */
             d << Debug::newline;

src/Magnum/Trade/Test/ImageConverterImplementationTest.cpp

@@ -253,7 +253,8 @@ void ImageConverterImplementationTest::pluginConfigurationInfoDoxygenDelimiter()
 # A comment
 value=yes
 # [configuration_]
-privateValue=SECRET
+
+newlyAddedValue=42
 )";
     Utility::Configuration conf{in};
 
@@ -265,7 +266,9 @@ privateValue=SECRET
     CORRADE_COMPARE(out.str(),
         "Configuration:\n"
         "  # A comment\n"
-        "  value=yes\n");
+        "  value=yes\n"
+        "\n"
+        "  newlyAddedValue=42\n");
 }
 
 void ImageConverterImplementationTest::importerInfo() {