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Changes between Version 4 and Version 5 of TraineesNotes

-                      v4
+                      v5
 -- disjunctive dependencies ("OR")
 --- APT looks through package list to see if any of the packages are installed.  If they do, success.
 ---- if not, look at beginning of list, try to install that, if succeeds, success.  If not, try next.
 ---- don't misuse them for optional deps (e.g. foo | basefiles), because basefiles will always satisfy it, and it'll never try foo.
+---if not, look at beginning of list, try to install that, if succeeds, success.  If not, try next.
+---don't misuse them for optional deps (e.g. foo | basefiles), because basefiles will always satisfy it, and it'll never try foo.
 Recommendations:
 …
 talk about "set -e"
 doesn't _have_ to be in shell, but should be.
 shell idiom " || :"  (if this fails, don't error out)  (|| true is more readble and equal nowadays)
 "something || [ $? = 123 ]"  so if something returns 123, it's not an error, but other error codes might be
+    shell idiom " || :"  (if this fails, don't error out)  (|| true is more readble and equal nowadays)
+    "something || [ $? = 123 ]"  so if something returns 123, it's not an error, but other error codes might be