Added comment about git blame

.git-blame-ignore-revs

@@ -0,0 +1,2 @@
+# Migrate code style to Black
+41e60425a96eeddb45f3a9f9bfc5ef491ce8e071

flaschengeist/readme.md

@@ -1,6 +1,5 @@
 # Flaschengeist
 
-
 ## Installation
 ### Requirements
 - mysql or mariadb
@@ -28,6 +27,16 @@ or with debug messages:
 
     run_flaschengeist --debug
 
+## Development
+### Misc
+When using `git blame` use this to ignore the code formatting commits:
+
+    $ git blame FILE.py --ignore-revs-file .git-blame-ignore-revs
+Or if you just want to use `git blame`, configure git like this:
+
+    $ git config blame.ignoreRevsFile .git-blame-ignore-revs
+
+
 ## Plugin Development
 ### File Structure
     flaschengeist-example-plugin