Should not assume the start line of multi-declarations statement does not has other statements on the same line

[CharlesZ-Chen]

Consider following examples:

//nested multi-declarations statement nested in anonymous class declarations
Object c = new C() { String a, b; };

//bad style of writing multiple statements in one line
Object d; String e, f;

These two examples would break the assumption of multiDeclRefactor that "the start line of multi-declarations statement does not has other statements on the same line".

Although above examples should be hopefully very rare to happen in real-world applications, multiDeclRefactor should be able to handle above cases correctly.