1 # DP: document deprecated syntax for arithmetic evaluation.
6 \fB$((\fP\fIexpression\fP\fB))\fP
9 +The old format \fB$[\fP\fIexpression\fP\fB]\fP is deprecated and will
10 +be removed in upcoming versions of bash.
14 is treated as if it were within double quotes, but a double quote