$ man bash
...
CONDITIONAL EXPRESSIONS
...
-a file
True if file exists.
-e file
True if file exists.
...
'May be' would be nice for newbies to precise which options are [ specific
vs [[ specific for instance
-a file
True if file exists ([[ only, for [ see test builtin)
This to avoid things like
$ [ -a /tmp ] && echo ok || echo nok
ok
$ [ ! -a /tmp ] && echo ok || echo nok
ok
I know it is obvious, unless this is intended to force a complete
multi-pass man read...
