if i'm simply unaware of such bash features, please feel free to yell at me :)
when working on misc bash scripts, i semi-frequently find the need to do some
sort of string processing along the lines of say changing a string to all
upper case or lower case ... if 'tr' was a bash builtin, then that'd work
with some `echo | tr` magic, but it something like
${foo//[[:lower:]]/[[:upper:]]} would be nice
-mike
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