Code coverage off by 2 lines in components with co-located template

In components with a co-located template, the plugin adds `import { hbs }` and `const __COLOCATED_TEMPLATE__ = ...` to the source file, and that is affecting the code coverage. Not only does this affect the percentage itself, as `const __COLOCATED_TEMPLATE__ = ...` is seen as a line that is covered without it being part of the source code, it also makes it very difficult to look at a coverage report as the lines are off by 2 (see screenshot)

In https://github.com/ember-cli/ember-cli-htmlbars/pull/558 and https://github.com/ember-cli/ember-cli-htmlbars/pull/763, something similar is addressed, but then just for source maps which appeared to be resolved without the fixes. However, for the code coverage this is still relevant, and placing the lines at the end would at least solve the off-by-2 issues (would have been fun if it was the typical off-by-1 error :smile:)


先为一个带有同位置模板的组件生成覆盖率报告，并将其与此处描述的生成源代码进行比较。使用相关的 pull request #558 和 #763 作为上下文。当注入的 import 和模板常量不再导致报告的源代码行发生偏移，也不再被计入源代码覆盖率时，即视为完成。

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