Semantic definition of RegEx defined target

[MasterInQuestion]

    [ Draft Unfinished ]
    Up: https://old.reddit.com/r/uBlockOrigin/comments/1kq8tdu/bug_any_of_the_2_rules_may_cause_cosmetic_filters/?sort=old#mt5qo45

    “/b\.co/##*:style( color: red !important; )
    .
    Would turn "github.com" bleeding red...
    (unlike what "b.co## ..." did)”

    “/b\.co/##
    ; is a regular expression.
    It will match anything in the hostname: "github.com"
[ ^
    Precisely, ~~everything~~ in the "location.href".
    Stripped protocol (e.g. "http://") for the "##" alike variants. (HTML-specific filters, a.k.a. "cosmetic")
    Else (generic, "network") full URL.

    Also note the RegEx case sensitivity settings are also different:
    Generic filters default case-insensitive; others case-sensitive.

    E.g. /^httpS:\/\/exaMple\.Com\/https:\/\/gitHub\.com\/$/$doc ]

    b.co##
    ; will match exactly: "b.co" or "www.b.co"”

    The URL can be actually alike:
https://example.com/https://github.com/
    /https:
    ./github.com/
    [ ^ Effective path "/https:/github.com/" at "example.com". ]

    To address the problem ...