Update bug_report.md

Author: hauke96

.github/ISSUE_TEMPLATE/bug_report.md

@@ -7,23 +7,32 @@ assignees: ''
 
 ---
 
+## Context
+
+### wiki2book version
+
+* Version or commit-hash:
+* Pandoc version used:
+* Other software information that might be helpful:
+
+### What article is this all about?
+
+* Link to the exact Wikipedia article:
+* Passage (e.g. section) in which the issue is:
+
 ## Bug description
 A clear and concise description of what the bug is.
 
-**What was the error message?**
-Give the relevant error message(s) and also attach the complete log to this issue.
+### Error messages
+Give the relevant error message(s) and also attach the complete log produced by wiki2book to this issue.
 
-## Reproducing the bug
+### Analysis
+If you analyzed the bug already, describe any further details of the bug.
+
+### Reproducing the bug
 Steps to reproduce the behavior:
 1. The article, problematic mediawiki code, project file, etc.
 2. All parameters you used (the *exact* wiki2book CLI call)
 3. All configurations you used
 4. See error
 
-## Additional information
-
-**The used wiki2book version (or commit-hash)**
-
-**The used pandoc version**
-
-**Any other useful and/or related information**