fix: style nit

Author: tplooker

lib/context.js

@@ -1041,13 +1041,11 @@ function _expandIri(activeCtx, value, relativeTo, localCtx, defined, options) {
     }
   }
 
-  // prepend vocab
   if(relativeTo.vocab && '@vocab' in activeCtx) {
+    // prepend vocab
     value = activeCtx['@vocab'] + value;
-  }
-
-  // prepend base
-  else if(relativeTo.base && '@base' in activeCtx) {
+  } else if(relativeTo.base && '@base' in activeCtx) {
+    // prepend base
     if(activeCtx['@base']) {
       // The null case preserves value as potentially relative
       value = prependBase(prependBase(options.base, activeCtx['@base']), value);