doc: remove unnecessary blank before command option text

Bruce Momjian <bruce@momjian.us>

Commit: 3f8971d92e767acf6e3d6e27c4cab7bfd88b71f4
Author: Bruce Momjian <bruce@momjian.us>
Date: 2020-12-03T16:33:24Z
Releases: 14.0
doc: remove unnecessary blank before command option text

Backpatch-through: 11

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