Change for issue #373. Multiple declaration with implicit type.

[BrianFreemanAtlanta]

Link to issue(s) this covers
closes issue #373 .

Problem

Current conversion uses var for declarations with multiple variables but C# issues message that multiple declaration requires an explicit type.

Solution

I made a change in SplitVariableDeclarations to requireExplicitType for the first declaration when multiple declarations are involved.

Added test DeclarationStatementTwoVariables to confirm correction. Modified two affected tests after confirming they conform to the same pattern. Changed ForWithBlock and ForWithSingleStatement

• At least one test covering the code changed
• All tests pass

[GrahamTheCoder]

Looks good to me! I've just moved the logic to be calculated before the loop and thus not depend on span start. I couldn't think of a case where we'd want it to be different for each declarator, and no tests failed by doing so. If there was a particular case you were thinking of, do let me know.

Thanks again for your contribution. Have a look at the "good first issue"s if you're interested in doing more:
https://github.com/icsharpcode/CodeConverter/issues?q=is%3Aissue+is%3Aopen+label%3A%22good+first+issue%22