grep: -q and -s options reversed

[mknos]

• This grep has the standard meanings of options -s and -q backwards [1]
• -s is to suppress some errors
• -q is to make grep not show matches, and perform a quick search of one match per file
• test1: "perl grep -c yo grep" --> count the matches of "yo"
• test2: "perl grep -cv yo grep"--> count the lines not matching "yo"
• test3: "perl grep -q perl grep" --> quiet search for "perl"; exit status 0 indicates Match
• test4: "perl grep -q pascal grep" --> quiet search for "pascal"; exit status 1 indicates NoMatch
• test5: "perl grep -s greg greg" --> silent search for "greg" but the file doesn't exist; exit status 2 indicates Error
• Correct POD manual and usage string

1. https://pubs.opengroup.org/onlinepubs/009604299/utilities/grep.html

[coveralls]

Pull Request Test Coverage Report for Build 10303258577

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.7%) to 73.375%

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Totals
Change from base Build 10300132695:	-0.7%
Covered Lines:	350
Relevant Lines:	477

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💛 - Coveralls

[briandfoy]

changes: -s and -q were swapped in previous versions. -s is for suppressing errors, -q is for not showing matches