Man section for --inactivity-timeout is unclear

[DrewMcArthur]

The section of i3lock's man page regarding the -I --inactivity-timeout flag is unclear on the syntax. Based on error messages, I've gathered that the flag requires an int to supply the time after which the screen disappears, however this was not evident at first in the man file. I'd suggest simply adding the underlined 'seconds' after the -I switch's syntax, to clarify that it's necessary.

[Airblader]

The description of the command begins with

Specifies the number of seconds […]

Is that really unclear?

[acrisci]

It's inconsistent with the rest of the docs. If the argument takes a parameter, it should indicate that in the manual.