import-spacing
This commit updates the docs examples to be compatible with the `import-spacing` tslint rule. This is in preparation of updating the docs examples `tslint.json` to match the one generated for new Angular CLI apps in a future commit. PR Close #38143
We replace `mod` with `m` to be in line with what the CLI generates. PR Close #34599
PR Close #30563
PR Close #25892
PR Close #20306