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tr: improve -d option #367

Merged
merged 1 commit into from
Dec 5, 2023
Merged

tr: improve -d option #367

merged 1 commit into from
Dec 5, 2023

Commits on Dec 5, 2023

  1. tr: improve -d option 

    * GNU tr and OpenBSD tr do not allow a 2nd argument with -d, but allow it with -ds

%echo hello | perl tr -d l l # -d is ignored and l is replaced with l
hello

* Align usage string with SYNOPSIS
* test1: delete letter l: echo hello | perl tr -d l
* test2: delete letter l and o: echo hello | perl tr -d lo
* test3: exchange letters e and o: echo hello | perl tr eo oe
* Prevent $ARGV[0] from being set to undef by s/// in options loop
    @mknos
    mknos authored Dec 5, 2023
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