Merge branch 'jc/local-extern-shell-rules'

Document and apply workaround for a buggy version of dash that mishandles "local var=val" construct. * jc/local-extern-shell-rules: t1016: local VAR="VAL" fix t0610: local VAR="VAL" fix t: teach lint that RHS of 'local VAR=VAL' needs to be quoted t: local VAR="VAL" (quote ${magic-reference}) t: local VAR="VAL" (quote command substitution) t: local VAR="VAL" (quote positional parameters) CodingGuidelines: quote assigned value in 'local var=$val' CodingGuidelines: describe "export VAR=VAL" rule