Handle variable fonts like cascadia code that dont have a postfix variation prefix name for some of their faces

tools/utils/shlex/shlex.go

@@ -17,6 +17,7 @@ package shlex
 
 import (
 	"fmt"
+	"kitty/tools/utils"
 	"strings"
 	"unicode/utf8"
 )
@@ -182,6 +183,16 @@ func Split(s string) (ans []string, err error) {
 	return
 }
 
+func Quote(s string) string {
+	if s == "" {
+		return s
+	}
+	if utils.MustCompile(`[^\w@%+=:,./-]`).MatchString(s) {
+		return "'" + strings.ReplaceAll(s, "'", "'\"'\"'") + "'"
+	}
+	return s
+}
+
 // SplitForCompletion partitions a string into a slice of strings. It differs from Split in being
 // more relaxed about errors and also adding an empty string at the end if s ends with a Space.
 func SplitForCompletion(s string) (argv []string, position_of_last_arg int) {