Correcting exisiting grammar and adding test cases

[Vishalk91-4]

…ected attributes

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• N
• Y

re #2

2. What is the scope of this PR (e.g. component or file name):

• grammar.js
• grammar.json
• node-types.json
• test/corpus
• parser.c

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

This PR completes the below tasks

• Decorator Test Cases
• Unification test cases
• Attribute correction
• Grammar and test case for Raw String
• Adding More grammar for config and Test cases for Config_expr
• Adding Test cases for Quant any and all

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• N
• Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other

[Vishalk91-4]

@Peefy
I'm working on this PR
The checklist of the tasks, I am going to complete is mentioned above
I'll finish the checklist, then open this PR up, if it's fine with you

[Vishalk91-4]

@Peefy, It's ready for review

[Peefy]

LGTM