Fix operators in variable names

[DanPurdy]

If you had a variable followed by an operator i.e. $my-var*1.5 Gonzales would report the variable name as $my-var*1 therefore I've added a small bit of regex to split the string on these occasions which will cover the majority of problems we'd see.

fixes #901

<DCO 1.1 Signed-off-by: Dan Purdy [email protected]>

[coveralls]

Coverage remained the same at 97.527% when pulling 36b3b8f on DanPurdy:feature/fix-variable-name-format into a66c707 on sasstools:develop.

[bgriffith]

This appears to be fixed in the v3.4.6 release of Gonzales (tonyganch/gonzales-pe#226 (comment)), so it's likely we don't need this anymore. Could you take out your regex and try the tests?

[DanPurdy]

I don't think it would harm having it though just as a belts and braces for the future? But yeah, I'll try it.

[coveralls]

Coverage remained the same at 97.529% when pulling b82788f on DanPurdy:feature/fix-variable-name-format into 6fd0341 on sasstools:develop.

[coveralls]

Coverage remained the same at 97.529% when pulling b82788f on DanPurdy:feature/fix-variable-name-format into 6fd0341 on sasstools:develop.

[coveralls]

Coverage remained the same at 97.529% when pulling fd8d01b on DanPurdy:feature/fix-variable-name-format into 5b125b6 on sasstools:develop.