[flang] Intrinsic `SELECTED_CHAR_KIND` returns a different value from other compilers when there is a heading space in `NAME`

[DanielCChen]

Consider the following code:

program main
print *,selected_char_kind(" ascii")      ! heading space test
end

All gfortran, ifort and XLF returns -1 because of the heading space. Flang returns 1 however.
Is this different behavior intentional?

[llvmbot]

@llvm/issue-subscribers-flang-frontend

Author: Daniel Chen (DanielCChen)

Consider the following code: ``` program main print *,selected_char_kind(" ascii") ! heading space test end ```

All gfortran, ifort and XLF returns -1 because of the heading space. Flang returns 1 however.
Is this different behavior intentional?