ci: make sure dictionary is sorted and contains no duplicates

.github/workflows/ci.yml

@@ -1011,6 +1011,19 @@ jobs:
         with:
           tool: cargo-spellcheck
       - uses: actions/checkout@v4
+      - name: Make sure dictionary words are sorted and unique
+        run: |
+          # `sed` removes the first line (number of words) and
+          # the last line (new line). 
+          # 
+          # `sort` makes sure everything in between is sorted
+          # and contains no duplicates.
+          # 
+          # Since `sort` is sensitive to locale, we set it
+          # using LC_ALL to en_US.UTF8 to be consistent in different
+          # environments.
+
+          sed '1d; $d' spellcheck.dic | LC_ALL=en_US.UTF8 sort -uc
       - name: Run cargo-spellcheck
         run: cargo spellcheck --code 1
 

spellcheck.dic

@@ -1,30 +1,30 @@
 279
+&
++
+<
+=
+>
 \
 ~
-~4
-~12
-±1m
-±1ms
 —
-&
-+
 0o777
 0s
 0xA
 0xD
 100ms
 10ms
+~12
+±1m
+±1ms
 1ms
 1s
 250ms
 2x
+~4
 443
 450ms
 50ms
 8MB
-<
-=
->
 adaptor
 adaptors
 Adaptors
@@ -56,14 +56,14 @@ codec
 codecs
 combinator
 combinators
-Config
 config
+Config
 connectionless
 cpu
 cpus
 Customizable
-Datagram
 datagram
+Datagram
 datagrams
 deallocate
 deallocated
@@ -73,8 +73,8 @@ dequeued
 deregister
 deregistered
 deregistering
-Deregisters
 deregisters
+Deregisters
 deregistration
 descriptor's
 destructor
@@ -122,8 +122,8 @@ implementor
 implementors
 incrementing
 interoperate
-Invariants
 invariants
+Invariants
 io
 IOCP
 iOS
@@ -149,8 +149,8 @@ misconfigured
 mock's
 mpmc
 mpsc
-Multi
 multi
+Multi
 multicast
 Multithreaded