HTML report has spurious characters from console colors

[devdanzin]

HTML report generated with wily report --format HTML has spurious characters around the colored delta:

It comes from an incomplete text replacement in src/wily/commands/report.py:

wily/src/wily/commands/report.py

Line 181 in 72c4bb8

element = element.replace("[32m", "<span class='green-color'>")

Given that element above was constructed as below, there's a \u001b character that doesn't get replaced:

wily/src/wily/commands/report.py

Line 124 in 72c4bb8

f"\u001b[{meta['decrease_color']}m{delta:n}\u001b[0m"

To Reproduce

1. checkout wily's repo
2. wily build
3. wily report -n 135 --format HTML src\wily\commands\report.py loc
4. See spurious \u001b characters around delta in e.g. rev a96280e.

Expected behavior
Deltas should still be colored, but without spurious characters around them, as below:

Desktop (please complete the following information):

• OS: Windows
• Browser: Chrome
• Version: 1.24.2

I have a trivial fix, will submit PR.