doc: fix various typos

Add missing "^EOF$" in cue help import, and the cmd/cue reference.

Also, correct the output for a step in the Kubernetes tutorial. The
ultimate fix to prevent such stale output will land as part of #824.

Closes #868
cuelang/cue#868

GitOrigin-RevId: 743aae40feb5877449003770443e2a1b63cfe6ea
Change-Id: I98df683b2a329bc4bb75607817417066f5949bd4
Reviewed-on: https://cue-review.googlesource.com/c/cue/+/9281
Reviewed-by: Paul Jolly <paul@myitcv.org.uk>

cmd/cue/cmd/import.go

@@ -162,6 +162,7 @@ Examples:
   kind: Deployment
   name: booster
   replicas: 1
+  EOF
 
   # base the path values on the input
   $ cue import -f -l 'strings.ToLower(kind)' -l name foo.yaml

doc/cmd/cue.md

@@ -210,6 +210,7 @@ Examples:
   kind: Deployment
   name: booster
   replicas: 1
+  EOF
 
   # base the path values on th input
   $ cue import -f -p "x -> strings.ToLower(x.kind) x.name" foo.yaml

doc/tutorial/kubernetes/README.md

@@ -100,7 +100,7 @@ which they should belong.
 
 ```
 $ cue import ./... -p kube
-list, flag, or files flag needed to handle multiple objects in file "./frontend/bartender/kube.yaml"
+path, list, or files flag needed to handle multiple objects in file "./frontend/bartender/kube.yaml"
 ```
 
 Many of the files contain more than one Kubernetes object.