#4454 Clean up more tests and code

* Remove some tests we no longer need
* Delete blocks of redundant code
* Compress some tests together to simplify them
* Remove a little code for ancient linter versions
* Escape more executables we didn't escape before
* Rename a deno option that didn't match our conventions

test/handler/test_gcc_handler.vader

@@ -1,11 +1,7 @@
 Execute(The GCC handler should ignore other lines of output):
   AssertEqual
   \ [],
-  \ ale#handlers#gcc#HandleGCCFormatWithIncludes(347, [
-  \   'foo',
-  \   'bar',
-  \   'baz',
-  \ ])
+  \ ale#handlers#gcc#HandleGCCFormatWithIncludes(347, ['foo', 'bar', 'baz'])
 
 Execute(GCC errors from included files should be parsed correctly):
   AssertEqual