Update base.rst
Merge pull request #6352 from atlytle/patch-1

Update base.rst
Format code in Terminals.jl
Format code in LineEdit.jl
Format code in REPLCompletions.jl
Format code in REPL.jl
Merge pull request #6351 from JuliaLang/cb/replformat

Format new REPL code to fit in with the rest of Base
add documentation for cov and cor (new api)
Merge pull request #6358 from lindahua/master

add documentation for cov and cor (new api)
add news entry for cov & cor
Merge pull request #6359 from lindahua/covnews

add news entry for cov & cor