Fixes a trivial bug in dumped parse/query/plan trees

[Chao Li]

Hi Hackers, This patch fixes a trivial bug where an extra whitespace was added when dumping an array, for example: ```   :sort.numCols 2   :sort.sortColIdx ( 1 4)   :sort.sortOperators ( 97 1754)   :sort.collations ( 0 0)   :sort.nullsFirst ( false false) ``` The unnecessary whitespace is now removed. Regard regards, -- Chao Li (Evan) HighGo Software Co., Ltd. https://www.highgo.com/

v1-0001-Fixes-a-trivial-bug-in-dumped-parse-query-plan-tr.patch
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