fix(apib): prevent double trailing newlines

Author: kylef

packages/fury-adapter-apib-serializer/CHANGELOG.md

@@ -1,5 +1,12 @@
 # Fury API Blueprint Serializer
 
+## Master
+
+### Bug Fixes
+
+- Prevent double new lines being appended to the end of serialized API
+  Blueprints.
+
 ## 0.12.0 (2019-07-02)
 
 ### Enhancements

packages/fury-adapter-apib-serializer/lib/adapter.js

@@ -37,7 +37,8 @@ function serialize({ api }) {
       }
 
       // Attempt to filter out extra spacing
-      return resolve(apib.replace(/\n\s*\n\s*\n/g, '\n\n'));
+      const result = apib.trim().replace(/\n\s*\n\s*\n/g, '\n\n');
+      return resolve(`${result}\n`);
     });
   });
 }

packages/fury-adapter-apib-serializer/test/adapter-test.js

@@ -43,7 +43,7 @@ describe('API Blueprint serializer adapter', () => {
           return done(serializeErr);
         }
 
-        expect(serialized.trim()).to.deep.equal(expectedBlueprint.trim());
+        expect(serialized).to.deep.equal(expectedBlueprint);
         return done();
       });
     });