[Issue 22773] New: Line with spaces in cmdfile is treated as multiple arguments

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22773

          Issue ID: 22773
           Summary: Line with spaces in cmdfile is treated as multiple
                    arguments
           Product: D
           Version: D2
          Hardware: All
                OS: Windows
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: moonlightsentinel at disroot.org

Each line of a command file should denote a single argument. But dmd will
currently split lines that contain spaces into multiple arguments, e.g.

-JE:\repos\dmd tmp\generated\windows\release\64

is processed as 
1. -JE:\repos\dmd
2. tmp\generated\windows\release\64

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