Improve sprintf docs, minor String::Formatter refactors#6758

Merged

sdogruyol merged 4 commits intocrystal-lang:masterfrom wooster0:sprintf

Oct 12, 2018

+69-61

Commits on Sep 15, 2018

Improve sprintf docs, minor String::Formatter refactors
r00ster
committed

Commits on Sep 20, 2018

Add sharp to recreate_float_format_string
r00ster
committed
Remove 2 brackets
wooster0
authored

Commits on Oct 10, 2018

'0'..'9' ->'1'..'9'
wooster0
authored