Improve handling of refactored concatenated strings

[tsantalis]

https://github.com/neo4j/neo4j/commit/03ece4f24163204d8a3948eb53576f1feaa86a61#diff-98890cebc6bfa323c73ece0cc5bb33d966544e06a42251033dff545ac12207ccR91-R92

There are two Extract Variable refactorings happening in this case, one in the source method (message variable) and one in the extracted method (help variable).

We have the following issues:

1. storeDir variable is not matched in the initializer of extracted variable message
2. storeLockFile variable in not matched in the initializer of extracted variable message
3. the initializer of variable help should be matched with part(s) of the string literals in the throw statements.

[pouryafard75]

Replicated at https://github.com/pouryafard75/TestCases/commit/956a94a7736152c85548ab7c6a048f2d9afa8959

[pouryafard75]

@tsantalis Is this the expected behavior?

You can find the exportedHTML export.zip

[tsantalis]

@pouryafard75 How did you do that? !!!!!! It's even better than what I thought it would be possible.

[tsantalis]

The multi-mapping with ". " on the right is a bit strange

[tsantalis]

Fixed:

1. storeDir variable matched in the initializer of extracted variable message
2. storeLockFile variable matched in the initializer of extracted variable message

[pouryafard75]

@tsantalis Can you please take a verify the correctness for this exportedHTML.zip? I have tested and all of the cases are passing.