Add concretise and containerise aliases for our UK users

From a user:

> Aargh.
> ```
> ==> Error: concretise is not a recognized Spack command or extension command; check with `spack commands`.
> ```

To make things easier for our friends in the UK, this adds `concretise` and
`containerise` aliases for the `spack concretize` and `spack containerize` commands.

- [x] add aliases
- [x] update completions

lib/spack/spack/main.py

@@ -51,7 +51,7 @@
 stat_names = pstats.Stats.sort_arg_dict_default
 
 #: top-level aliases for Spack commands
-aliases = {"rm": "remove"}
+aliases = {"concretise": "concretize", "containerise": "containerize", "rm": "remove"}
 
 #: help levels in order of detail (i.e., number of commands shown)
 levels = ["short", "long"]

share/spack/spack-completion.bash

@@ -337,7 +337,7 @@ _spack() {
     then
         SPACK_COMPREPLY="-h --help -H --all-help --color -c --config -C --config-scope -d --debug --timestamp --pdb -e --env -D --env-dir -E --no-env --use-env-repo -k --insecure -l --enable-locks -L --disable-locks -m --mock -b --bootstrap -p --profile --sorted-profile --lines -v --verbose --stacktrace --backtrace -V --version --print-shell-vars"
     else
-        SPACK_COMPREPLY="add arch audit blame bootstrap build-env buildcache cd change checksum ci clean clone commands compiler compilers concretize config containerize create debug dependencies dependents deprecate dev-build develop diff docs edit env extensions external fetch find gc gpg graph help info install license list load location log-parse maintainers make-installer mark mirror module patch pkg providers pydoc python reindex remove rm repo resource restage solve spec stage style tags test test-env tutorial undevelop uninstall unit-test unload url verify versions view"
+        SPACK_COMPREPLY="add arch audit blame bootstrap build-env buildcache cd change checksum ci clean clone commands compiler compilers concretize concretise config containerize containerise create debug dependencies dependents deprecate dev-build develop diff docs edit env extensions external fetch find gc gpg graph help info install license list load location log-parse maintainers make-installer mark mirror module patch pkg providers pydoc python reindex remove rm repo resource restage solve spec stage style tags test test-env tutorial undevelop uninstall unit-test unload url verify versions view"
     fi
 }
 
@@ -737,6 +737,10 @@ _spack_concretize() {
     SPACK_COMPREPLY="-h --help -f --force --test -q --quiet -U --fresh --reuse --reuse-deps -j --jobs"
 }
 
+_spack_concretise() {
+    SPACK_COMPREPLY="-h --help -f --force --test -q --quiet -U --fresh --reuse --reuse-deps -j --jobs"
+}
+
 _spack_config() {
     if $list_options
     then
@@ -830,6 +834,10 @@ _spack_containerize() {
     SPACK_COMPREPLY="-h --help --list-os --last-stage"
 }
 
+_spack_containerise() {
+    SPACK_COMPREPLY="-h --help --list-os --last-stage"
+}
+
 _spack_create() {
     if $list_options
     then

share/spack/spack-completion.fish

@@ -365,8 +365,10 @@ complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a commands -d 'list
 complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a compiler -d 'manage compilers'
 complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a compilers -d 'list available compilers'
 complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a concretize -d 'concretize an environment and write a lockfile'
+complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a concretise -d 'concretize an environment and write a lockfile'
 complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a config -d 'get and set configuration options'
 complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a containerize -d 'creates recipes to build images for different container runtimes'
+complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a containerise -d 'creates recipes to build images for different container runtimes'
 complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a create -d 'create a new package file'
 complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a debug -d 'debugging commands for troubleshooting Spack'
 complete -c spack -n '__fish_spack_using_command_pos 0 ' -f -a dependencies -d 'show dependencies of a package'
@@ -1100,6 +1102,25 @@ complete -c spack -n '__fish_spack_using_command concretize' -l reuse-deps -d 'r
 complete -c spack -n '__fish_spack_using_command concretize' -s j -l jobs -r -f -a jobs
 complete -c spack -n '__fish_spack_using_command concretize' -s j -l jobs -r -d 'explicitly set number of parallel jobs'
 
+# spack concretise
+set -g __fish_spack_optspecs_spack_concretise h/help f/force test= q/quiet U/fresh reuse reuse-deps j/jobs=
+complete -c spack -n '__fish_spack_using_command concretise' -s h -l help -f -a help
+complete -c spack -n '__fish_spack_using_command concretise' -s h -l help -d 'show this help message and exit'
+complete -c spack -n '__fish_spack_using_command concretise' -s f -l force -f -a force
+complete -c spack -n '__fish_spack_using_command concretise' -s f -l force -d 're-concretize even if already concretized'
+complete -c spack -n '__fish_spack_using_command concretise' -l test -r -f -a 'root all'
+complete -c spack -n '__fish_spack_using_command concretise' -l test -r -d 'concretize with test dependencies of only root packages or all packages'
+complete -c spack -n '__fish_spack_using_command concretise' -s q -l quiet -f -a quiet
+complete -c spack -n '__fish_spack_using_command concretise' -s q -l quiet -d 'don\'t print concretized specs'
+complete -c spack -n '__fish_spack_using_command concretise' -s U -l fresh -f -a concretizer_reuse
+complete -c spack -n '__fish_spack_using_command concretise' -s U -l fresh -d 'do not reuse installed deps; build newest configuration'
+complete -c spack -n '__fish_spack_using_command concretise' -l reuse -f -a concretizer_reuse
+complete -c spack -n '__fish_spack_using_command concretise' -l reuse -d 'reuse installed packages/buildcaches when possible'
+complete -c spack -n '__fish_spack_using_command concretise' -l reuse-deps -f -a concretizer_reuse
+complete -c spack -n '__fish_spack_using_command concretise' -l reuse-deps -d 'reuse installed dependencies only'
+complete -c spack -n '__fish_spack_using_command concretise' -s j -l jobs -r -f -a jobs
+complete -c spack -n '__fish_spack_using_command concretise' -s j -l jobs -r -d 'explicitly set number of parallel jobs'
+
 # spack config
 set -g __fish_spack_optspecs_spack_config h/help scope=
 complete -c spack -n '__fish_spack_using_command_pos 0 config' -f -a get -d 'print configuration values'
@@ -1194,6 +1215,15 @@ complete -c spack -n '__fish_spack_using_command containerize' -l list-os -d 'li
 complete -c spack -n '__fish_spack_using_command containerize' -l last-stage -r -f -a 'bootstrap build final'
 complete -c spack -n '__fish_spack_using_command containerize' -l last-stage -r -d 'last stage in the container recipe'
 
+# spack containerise
+set -g __fish_spack_optspecs_spack_containerise h/help list-os last-stage=
+complete -c spack -n '__fish_spack_using_command containerise' -s h -l help -f -a help
+complete -c spack -n '__fish_spack_using_command containerise' -s h -l help -d 'show this help message and exit'
+complete -c spack -n '__fish_spack_using_command containerise' -l list-os -f -a list_os
+complete -c spack -n '__fish_spack_using_command containerise' -l list-os -d 'list all the OS that can be used in the bootstrap phase and exit'
+complete -c spack -n '__fish_spack_using_command containerise' -l last-stage -r -f -a 'bootstrap build final'
+complete -c spack -n '__fish_spack_using_command containerise' -l last-stage -r -d 'last stage in the container recipe'
+
 # spack create
 set -g __fish_spack_optspecs_spack_create h/help keep-stage n/name= t/template= r/repo= N/namespace= f/force skip-editor b/batch