switch from checkout to switch haha

appendix_purist_unit_tests.asciidoc

@@ -60,7 +60,7 @@ more isolated tests:
 
 [subs="specialcharacters,quotes"]
 ----
-$ *git checkout -b more-isolation*  # a branch for this experiment
+$ *git switch -c more-isolation*  # a branch for this experiment
 $ *git reset --hard revisit_this_point_with_isolated_tests*
 ----
 
@@ -2020,9 +2020,9 @@ We're happy with our new version, so let's bring it across to master:
 ----
 $ *git add .*
 $ *git commit -m "add list owners via forms. more isolated tests"*
-$ *git checkout master*
-$ *git checkout -b master-noforms-noisolation-bak* # optional backup
-$ *git checkout master*
+$ *git switch master*
+$ *git switch -c master-noforms-noisolation-bak* # optional backup
+$ *git switch -*
 $ *git reset --hard more-isolation*  # reset master to our branch.
 ----
 

chapter_19_spiking_custom_auth.asciidoc

@@ -120,7 +120,7 @@ your spike commits getting mixed up with your production code:
 
 [subs="specialcharacters,quotes"]
 ----
-$ *git checkout -b passwordless-spike*
+$ *git switch -c passwordless-spike*
 ----
 
 Let's keep track of some of the things we're hoping to learn from the
@@ -862,10 +862,13 @@ and reintroduce them one by one in a test-driven way.
 
 
 ==== Reverting Our Spiked Code
-//SARA: This section needs some sort of very brief intro before jumping into the code
+
+
+
+
 [subs="specialcharacters,quotes"]
 ----
-$ *git checkout main* # switch back to main branch
+$ *git switch main* # switch back to main branch
 $ *rm -rf src/accounts* # remove any trace of spiked code
 $ *git add src/functional_tests/test_login.py*
 $ *git commit -m "FT for login via email"*

rename-chapter.sh

@@ -15,8 +15,8 @@ fi
 git mv "source/$OLD_CHAPTER" "source/$NEW_NAME"
 
 cd "source/$NEW_NAME/superlists" 
-git checkout "$OLD_CHAPTER"
-git checkout -b "$NEW_NAME"
+git switch "$OLD_CHAPTER"
+git switch -c "$NEW_NAME"
 git push -u local
 git push -u origin
 cd ../../..

source/blackify-chap.sh

@@ -14,7 +14,7 @@ git fetch $REPO
 STARTCOMMIT="$(git rev-parse $PREV)"
 ENDCOMMIT="$(git rev-parse $CHAP)"
 
-git checkout $CHAP
+git switch $CHAP
 git reset --hard $REPO/$PREV
 ruff format .
 git commit -am"initial black commit" --allow-empty

source/feed-thru-cherry-picks.sh

@@ -31,7 +31,7 @@ fi
 git fetch "$REPO"
 
 # reset our chapter to the new version of the end of $PREV
-git checkout "$CHAP"
+git switch "$CHAP"
 git reset --hard "$REPO/$PREV"
 
 # now cherry pick all the old commits from $CHAP onto this new base.