eslint: enable semi-spacing checks
eslint: enable semi-spacing checks

Change-Id: I41bc901dfe14810f409e080fdf79943d28fe7825
Reviewed-on: https://chromium-review.googlesource.com/c/apps/libapps/+/2141062
Reviewed-by: Joel Hockey <9ecfc52dc2ffef73afac73f3495f294aeddf1231@chromium.org>
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>

chromium/hterm,chromium/hterm,chromium/hterm,chromium/hterm