Phil Christensen 22e0b9f376
improve logic expression evaluation (#7508)
* better logic expression evaluation

Improve the logic expression evaluation currently used when filtering
dependencies.

Biggest improvements:
+  Allow '|' operator
+  Support nested '()'
+  Allow whitespace
+  Useful error message for malformed expressions

Also changed names of types to RawParagraph when that is what the original author was using.
2019-08-02 21:37:49 -07:00
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