Avoid non-POSIX flags for `diff` in `make demos` target

DrTimothyAldenDavis / SuiteSparse

The official SuiteSparse library: a suite of sparse matrix algorithms authored or co-authored by Tim Davis, Texas A&M University.

https://people.engr.tamu.edu/davis/suitesparse.html

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Avoid non-POSIX flags for `diff` in `make demos` target #679

Closed mmuetzel closed 8 months ago

mmuetzel commented 8 months ago

The flag --strip-trailing-cr is a non-standard flag for diff and isn't supported on Alpine Linux. Try to use commands that work across POSIX-compatible platforms.