simplify read/write operation regex

[watermarkhu]

The removed lines were probably copied from

MATLAB-Language-grammar/Matlab.tmbundle/Syntaxes/MATLAB.tmLanguage

Line 2866 in 4f1c0c8

<string>(?&lt;![a-zA-Z0-9_]|\.)[a-zA-Z][a-zA-Z0-9_]*(?:\.[a-zA-Z][a-zA-Z0-9_]*)*(?![a-zA-Z0-9_]|(?:\(|\{|\.\())</string>

The negative lookahead on [a-zA-Z0-9_] does nothing due to the [a-zA-Z0-9_]* just before.

[dklilley]

Trying this out on regex101, it appears that there is a difference in behavior. The original property regex matches asd in foo.asd, but does not match it in foo.asd(. However, the new regex matches as in foo.asd(.

Can you confirm?

[watermarkhu]

This seems indeed to be the case. I'll add a test to this PR instead.

[dklilley]

Hi Mark, sorry for the delay in getting back to this. What is the current status of this PR? It looks like the only change right now is to a test file.

[watermarkhu]

Hi Duncan,
The original edit was invalid. But there also wasn't a test to check for the behavior as you indicated. So the edit is disregarded but a test has been added.

[dklilley]

Makes sense, thank you!