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77ab3a1d5f
Replace most call to grep in run-make by a script that cat the input. Introduced a new `src/etc/cat-and-grep.sh` script (called in run-make as `$(CGREP)`), which prints the input and do a grep simultaneously. This is mainly used to debug spurious failures in run-make, such as the spurious error in #45810, as well as real errors such as #46126. (cc #40713) Some `grep` still remains, mainly the `grep -c` calls that count the number of matches and print the result to stdout.