TestOther: Shorter test cases

[rikardfalkeborn]

• Remove newlines after check(
• Remove unneeded statements after if-statements

As an example, the previous test case

check(
    "bool foo(int x) {\n"
    "  if (x < 0)"
    "    return true;\n"
    "  return false;\n"
    "}");

is changed to

check("void foo(int x) {\n"
      "  if (x < 0) {}\n"
      "}");

[rikardfalkeborn]

As suggested in #1630. I think the simplest way to review this is to look at the word-diff and ignore white space changes (there's a lot of indentation changes that can be "checked" by running astyle).