Always try to add additional files

Fixes #9

1 files changed, 3 insertions, 1 deletions

diff --git a/src/bin/mdbook-mermaid.rs b/src/bin/mdbook-mermaid.rs
index cb95070..e1ff399 100644
--- a/src/bin/mdbook-mermaid.rs
+++ b/src/bin/mdbook-mermaid.rs
@@ -107,7 +107,9 @@ fn handle_install(sub_args: &ArgMatches) -> ! {
         add_preprocessor(&mut doc);
     }
 
-    if !has_pre || add_additional_files(&mut doc) {
+    let added_files = add_additional_files(&mut doc);
+
+    if !has_pre || added_files {
         log::info!("Saving changed configuration to {}", config.display());
         let toml = doc.to_string_in_original_order();
         let mut file = File::create(config).expect("can't open configuration file for writing.");