如图想换几个空格就敲几个空格键

{ "keys": ["tab"], "command": "insert_best_completion", "args": {"default": "\t", "exact": true} },{ "keys": ["tab"], "command": "insert_best_completion", "args": {"default": "    ", "exact": false},"context":[{ "key": "setting.tab_completion", "operator": "equal", "operand": true }]},{ "keys": ["tab"], "command": "reindent", "context":[{ "key": "setting.auto_indent", "operator": "equal", "operand": "    " },{ "key": "selection_empty", "operator": "equal", "operand": true, "match_all": true },{ "key": "preceding_text", "operator": "regex_match", "operand": "^$", "match_all": true },{ "key": "following_text", "operator": "regex_match", "operand": "^$", "match_all": true }]},