First pass conversion of NAV Patterns

content/NAVPatterns/unreachable-code/index.md

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+title = "unreachable-code.md"
+weight = 1310
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+Do not write code that will never be hit.
+
+It affects code readability and can lead to wrong assumptions.
+
+Bad code
+
+    IF Type <\> Type::FIELD THEN BEGIN
+    ...
+    ERROR(...);
+    RecRef.CLOSE;
+    END;  
+      
+    
+
+Good code
+
+    IF Type <\> Type::FIELD THEN BEGIN
+    ...
+    RecRef.CLOSE;
+    ERROR(...);
+    END;