Update article.md

[apoorvachikara]

• updated incorrect spellings
• Updated the grammar-related errors
• Updated punctuations

[CLAassistant]

All committers have signed the CLA.

[joaquinelio]

I prefer "labeled" but I'm not native English speaker.

-123 Should it be quotation marks intead of quotes? I dont like "quote" as "citation"

-328 sound broken now. original is ok, it does mean a variable. (containing the name...)

[apoorvachikara]

• I prefer "labeled" but I'm not a native English speaker
  That is fine It won't change the meaning of the statement. I can revert it.
• 123 Should it be quotation marks instead of quotes? I don't like "quote" as "citation"
  Yes, it could be more descriptive if we use "quotation marks" instead of just quotes or quote
• 328 sound broken now. original is ok, it does mean a variable. (containing the name...)
  The better way- If we omit values inside the quotes, it should contain the actual name to be tested. For instance:

If you are fine with the above changes, I can make these changes and request PR.

[joaquinelio]

I didn't put this as review changes because my Eng is not good enough
I'm still learning:
The main meaning of "quotes" is "cite", but.
Here in the repo, "quotes" always refers to "quotation marks", the (noun) 2nd entry in the dictionary.
A string in JavaScript must be surrounded by quotes.

so, -328
I prefer the original (or simpler).
It does not "omit the value inside" but the marks:
test("name") --> test( name )

If we omit quotes, that means a variable containing the actual name to be tested.

[iliakan]

Merged, with "labeled" and "quotes" left "as is".