Syntax Highlighting regex+format strings (rf)

• Editor name and version: VSCode 1.75.1
• Platform: macOS
• Color scheme: Dark+ (default)
• MagicPython version: 1.1.0
• A sreenshot:
  
• 5-10 lines of surrounding code:

myString = "baz"
MYCONST = "qux"
myDict = {
    "foo": "bar"
}

correctColoring = rf"(?=[\w]+){myString}{MYCONST}[\d]+"

incorrectDictionary = rf"(?=[\w]+){myDict['foo']}[\d]+"
regularFString = f"word{myDict['foo']}number"

This is a followup to #186. After upgrading to 1.1.0, I'm very excited that rf strings support both regex style and format string. In the attached screenshot, behold how correctly varied correctColoring is. However, any dictionary or class inside of the {} in an rf string is not colored correctly. See how myDict['foo'] varies between incorrectDictionary and regularFString. The square brackets should be purple, and 'foo' orange, but instead it is all absorbed into red.

从这个 issue 中的 rf-string 示例开始，并将 myDict['foo'] 的高亮行为与常规 f-string 示例进行比较。检查与 issue #186 中后续工作的相关实现，在 VSCode 中复现错误的着色，并在 rf-string 格式字段中的 dictionary 或 class 表达式能够一致地高亮显示时，认为该 issue 已完成。