move principles before the rest

docs/coding-style.md

@@ -99,17 +99,17 @@ public void MethodB()
 
 ## Naming conventions
 
-### Casing
-
-Protected fields should start with lowercase letter.
-
 ### Principles
 
 Keep it minimal and suggestive.
 - Generic words that don't convey meaning (e.g. `Helper`) should be avoided.
 - Overwordy and complex names should be avoided as well.
 - Use positive naming when possible.
 
+### Casing
+
+Protected fields should start with lowercase letter.
+
 ### Parameters and variables
 
 Single variable lambdas should use `x` as the variable name (based on lambda calculus λx). Multi variable lambdas should use descriptive names, where `x` can be used for the main iterated item like `(x, index) => ...`. Name `c` can be used for context of Roslyn callback.