use Perl

Ingredients:

• basil leaves, about 4 cups
• salt, 1/4 tsp.
• virgin olive oil, about 1 cup
• 1 clove garlic
• 1/2 cup parmesan, grated
• 1/4 cup pine nuts

Wash and dry the basil leaves. Pack them firmly in the food processor. Add ingredients. Cream until stiff.

1 batch yields about 2 cups of pesto, or about 8 servings if you like it like I do.

Eat fresh pesto promptly. If you need to store it for more than a couple of days, freeze it; add a thin layer of olive oil to the top of the pesto to minimize freezer burn.

Code Points            1st Byte  2nd Byte  3rd Byte  4th Byte

U+0000..U+007F       00..7F
U+0080..U+07FF       C2..DF    80..BF
U+0800..U+0FFF       E0        A0..BF    80..BF
U+1000..U+CFFF       E1..EC    80..BF    80..BF
U+D000..U+D7FF       ED        80..9F    80..BF
U+D800..U+DFFF       ******* ill-formed *******
U+E000..U+FFFF       EE..EF    80..BF    80..BF
U+10000..U+3FFFF      F0        90..BF    80..BF    80..BF
U+40000..U+FFFFF      F1..F3    80..BF    80..BF    80..BF
U+100000..U+10FFFF     F4        80..8F    80..BF    80..BF

And the equivalent regex:

qr{
        (?:
                                                [\x00-\x7f]  #   U+0000 .. U+007F
        |
                                    [\xc2-\xdf] [\x80-\xbf]  #   U+0080 .. U+07FF
        |
                               \xe0 [\xa0-\xbf] [\x80-\xbf]  #   U+0800 .. U+0FFF
        |
                        [\xe1-\xec] [\x80-\xbf] [\x80-\xbf]  #   U+1000 .. U+CFFF
        |
                               \xed [\x80-\x9f] [\x80-\xbf]  #   U+D000 .. U+D7FF
        |
                        [\xee-\xef] [\x80-\xbf] [\x80-\xbf]  #   U+E000 .. U+FFFF
        |
                   \xf0 [\x90-\xbf] [\x80-\xbf] [\x80-\xbf]  #  U+10000 .. U+3FFFF
        |
            [\xf1-\xf3] [\x80-\xbf] [\x80-\xbf] [\x80-\xbf]  #  U+40000 .. U+FFFFF
        |
                   \xf4 [\x80-\x8f] [\x80-\xbf] [\x80-\xbf]  # U+100000 .. U+10FFFF
        )
}x;

This has proven useful as I search for errant Latin-1 characters embedded in some files.