256-color SGR 'Select foreground color' code results in unreadable blinking text

[marshray]

256-color mode ANSI sequences [wikipedia] take the form:

• \\u001b[38;5; n ;m    Select foreground color
• \\u001b[48;5; n ;m    Select background color

This extension does not recognize that SGR codes 38 and 48 consume the next two (or four) numbers in the sequence and instead interprets them as codes. So in the 'Select foreground color' sequence (above), the number 5 is erroneously interpreted as SGR code 5 'Slow blink'.

The 24 bit color sequences are likely problematic too:

• \\u001b[38;2; r ; g ; b ;m    Select RGB foreground color
• \\u001b[48;2; r ; g ; b ;m    Select RGB background color

Thanks!

[TobiasFaller]

Thank you for the issue. I'll fix it when I have vacation.