gmv_cmd: help message formatting

[weakish]

Previously gmvault sync -h outputs:

-g REQ, --gmail-req REQ
Gmail search request to restrict sync as defined inhtt
ps://support.google.com/mail/bin/answer.py?hl=en&answe r=7190

i.e. no space between inhttps://...

This commit fix this.

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src/gmv/gmv_cmd.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)