https://issues.dlang.org/show_bug.cgi?id=12758

          Issue ID: 12758
           Summary: allow file names with hyphens
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: DMD
          Assignee: nobody@puremagic.com
          Reporter: tombrowder@acm.org

D source file names with hyphens should be allowed, e.g., "test-bu.d".

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