[Issue 19050] Running the DMD test suite with a compiler compiled in debug mode fails due to invalid characters, -

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19050

--- Comment #1 from github-bugzilla at puremagic.com ---
Commit pushed to master at https://github.com/dlang/dmd

https://github.com/dlang/dmd/commit/9d0862343a5ceea2e63be12a29b8a525428f093b
Fix Issue 19050 - Fix invalid characters in mangling

Running the DMD test suite with a compiler compiled in debug mode
fails due to invalid characters, `-`, exist in the mangled names of
some unittest blocks.

This fix centralizes the validation of mangled characters and properly
replaces `-` in the mangled names of unittest blocks with `_`.

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