Fix regex problem under Java 12 language level#2

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DavidWhitlock wants to merge 2 commits intoProject_2from

Project_2_fix_regex

Commits on Jul 16, 2021

javadoc complains about the use of a Java 15 language feature when it's run with the Java 12 language compatibility level. To fix this, I changed the regular expression to escape the backslash, li…
DavidWhitlock
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Commits on Jul 21, 2021

Fixed some tests
BennettDesmond
committed