Fix mistakes wrs to spelling#1

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la3lma wants to merge 2 commits intoafarhan:masterfrom

Commits on Dec 26, 2017

Fixing typo
Bjørn Remseth
committed
Fix error mistakes with respecte to decadic prefixex (kilo == 'k', mega == 'M'), and frequencyc (always 'Hz')
Bjørn Remseth
committed