[Abcde-users] Patch to tidy the main routine, and avert loosing variable declarations by not using subshells

[Roger]

Here's a few more trivial notes concerning subshells.

1) Only the processes (ie. variables) stipulated in the first level of curly 
braces are run within the scope of the original Bash shell. Any nested curly 
braces will run in their own scoped Bash shell.

2) Basically, the use of pipes is causing additional subshells, so don't use 
that method when attempting to interrogate what's going on.

The above is referenced from: 
http://unix.stackexchange.com/questions/127334/bash-subshell-creation-with-curly-braces


Also see for further notes concerning differences between parenthesis & curly 
braces:
Grymoire.com; Changing Precedence
http://www.grymoire.com/Unix/Sh.html#uh-74


-- 
Roger
http://rogerx.freeshell.org/