Consistency of read() and write() functions. #14608

replace readall() with readstring()
replace readbytes() with read()

readbytes! returns nb whereas read! returns array, so they can't
trivially be merged.

Fix test/replutil.jl test that matches output of method error message
that has changed due to introduction of readbytes(::AbstractString).

add: +eachline(filename::AbstractString) = EachLine(open(stream), close)

revert mistaken docstring change -- read! vs readbytes!

update base/docs/helpdb/Base.jl

update rst docs, BBEditTextWrangler-julia.plist

replace missing chomp() in getmetabranch()

doc tweaks

make && make julia-genstdlib

more doc tweaks

whitespace tweak

doc: read!(stream or filename, ...)

Author: samoconnor

base/pkg/git.jl

@@ -22,7 +22,7 @@ end
 
 cmd(args::Cmd; dir="") = `$(git(dir)) $args`
 run(args::Cmd; dir="", out=STDOUT) = Base.run(pipeline(cmd(args,dir=dir), out))
-readall(args::Cmd; dir="") = Base.readall(cmd(args,dir=dir))
+readstring(args::Cmd; dir="") = Base.readstring(cmd(args,dir=dir))
 readchomp(args::Cmd; dir="") = Base.readchomp(cmd(args,dir=dir))
 
 function success(args::Cmd; dir="")