Email over E-mail

While I believe "e-mail" is the actually correct spelling, we tend to
say "email" everywhere else. See:

````
todb@mazikeen:~/git/rapid7/metasploit-framework$ grep -ri "print.*email"
modules/ | wc -l
19
[ruby-2.1.5@metasploit-framework](fixup-grammar)
todb@mazikeen:~/git/rapid7/metasploit-framework$ grep -ri
"print.*e-mail" modules/ | wc -l
1
````
Margins on description, PowerShell not Powershell
Land #4334, @todb-r7's cosmetic fixes