Werk #11131: filestats: fix typo and grammar

Component WATO
Title filestats: fix typo and grammar
Date Jun 29, 2020
Checkmk Editon Checkmk Raw (CRE)
Checkmk Version 2.0.0i1
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed

Fix some typos and grammar issues in the description text in the WATO plugin

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