Fix null pointer error with blank paths

Author: Mark Robinson

src/main/java/org/commonwl/view/github/GithubDetails.java

@@ -34,7 +34,6 @@ public class GithubDetails implements Serializable {
     public GithubDetails(String owner, String repoName, String branch, String path) {
         this.owner = owner;
         this.repoName = repoName;
-        this.path = path;
 
         // Default to the master branch
         if (branch == null || branch.isEmpty()) {
@@ -43,6 +42,13 @@ public GithubDetails(String owner, String repoName, String branch, String path)
         } else {
             this.branch = branch;
         }
+
+        // Default to root path
+        if (path == null || path.isEmpty()) {
+            this.path = "/";
+        } else {
+            this.path = path;
+        }
     }
 
     public String getOwner() {

src/main/resources/templates/fragments/error.html

@@ -40,7 +40,7 @@ <h1>Whoops - Something Went Wrong!</h1>
                     </div>
                     <p>
                         If this error was unexpected, you can help us by
-                        <a href="https://github.com/common-workflow-language/cwlviewer/issues" rel="noopener" target="_blank">creating a Github issue</a>
+                        <a href="https://github.com/common-workflow-language/cwlviewer/issues" rel="noopener" target="_blank">creating a Github issue</a> with details on how to reproduce it
                         and/or <a href="https://gitter.im/common-workflow-language/common-workflow-language" rel="noopener" target="_blank">discussing it on Gitter</a>
                     </p>
                 </div>

src/main/resources/templates/workflow.html

@@ -216,7 +216,7 @@ <h2>Steps</h2>
                                 (<span th:text="${step.value.runType}">Workflow</span>)
                             </div>
                             <div th:if="${step.value.run != null and step.value.runType == null}">
-                                <span th:text="${step.value.run} + '(?)'" class="notFound" data-tooltip="true" th:title="'Not Found - Must be somewhere within this repository">workflow.cwl (?)</span>
+                                <span th:text="${step.value.run} + '(?)'" class="notFound" data-tooltip="true" title="Not Found - Must be somewhere within this repository">workflow.cwl (?)</span>
                             </div>
                         </td>
                         <td th:text="${step.value.label}">Label</td>