Add missing deprecation text for explode

Also, fix trivial typo in a comment as reported at
https://goreportcard.com/report/github.com/elves/elvish

pkg/eval/builtin_fn_container.go

@@ -82,6 +82,8 @@ import (
 // explode $iterable
 // ```
 //
+// This function is deprecated; use [all](#all) instead.
+//
 // Put all elements of `$iterable` on the structured stdout. Like `flatten` in
 // functional languages. Equivalent to `[li]{ put $@li }`.
 //

pkg/shell/paths_unix.go

@@ -9,7 +9,7 @@ import (
 	"syscall"
 )
 
-// Returns a "run directory" for storing ephemeral files, which is guranteed
+// Returns a "run directory" for storing ephemeral files, which is guaranteed
 // to be only accessible to the current user.
 //
 // The path of the run directory is either $XDG_RUNTIME_DIR/elvish or