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Global symbol "%white" requires explicit package name at MyTest.pm lin
+e 33.
Global symbol "@browser" requires explicit package name at MyTest.pm l
+ine 33.
...
Global symbol "$blue" requires explicit package name at MyTest.pm line
+ 34.
Global symbol "$diff_file" requires explicit package name at MyTest.pm
+ line 35.
Global symbol "$diff_file" requires explicit package name at MyTest.pm
+ line 38.