8196399: Formatting a decimal using locale-specific grouping separators causes ArithmeticException (division by zero). 8199672: ClassCastException is thrown by java.util.Formatter when an NumberFormatProvider SPI is used. Reviewed-by: naoto

^build/
^dist/
^.idea/
nbproject/private/
^webrev
^.src-rev$
^.jib/
\.DS_Store
\.metadata/
\.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
.*/JTreport/.*
.*/JTwork/.*