PR# 19645 Class editor loses distinction between text enclosed inside a string, and other class text

In the 'note' section at the head of a CLASS, I use "[  ]" to enclose an extended_description and TODO text, and frequently type one or more blank lines after
the initial "[ before typing the closing ]", for convenience in subsequently typing into that space.
In that case, not all of the enclosed space is recognized as STRING content.

Either add, to the note section at the head of the class:

test: "[


]"
and then type 'from ' above the ending ]" which is expanded into 'from until ...]

OR

test_feature: STRING = "[


]"
and then type 'from ' above the closing ]" which is then expanded 'from until ...'