当用作等宽字体时，使用非等宽字体的替换字符以正确的宽度显示

Web browsers replace a missing character in a font (usually an arrow, a graphical symbol and in my particular use-case the unicode character "≫" (U+226B)) with the character from another font. If you are using a monospace-font, the replacement character comes (most of the time) from a proportional font and will mess up the strict grid-pattern that is in many cases desired when monospace fonts are used.Web browsers replace a missing character in a f