[clang] [libclang/python] Add some logical typing changes. (PR #138074)

[Vlad Serebrennikov via cfe-commits]

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@@ -2888,8 +2896,7 @@ def string(self):
 
         if res:
             return CompletionString(res)
-        else:
-            None
+        return None
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Endilll wrote:

Can you invert this if statement, so that we do early exit on unhappy code paths?

https://github.com/llvm/llvm-project/pull/138074