Wr/replace multiline commands

[WillieRuemmele]

What does this PR do?

allows the dev convert command to handle mult-line commands like

sfdx force:user:create -f config/user-def.json \
  -a myuser \
  -o myorg

and converts them

sf org create user --definition-file config/user-def.json \
 --set-alias myuser \
 --target-org myorg 

What issues does this PR fix or reference?

@W-14135637@

[iowillhoit]

QA NOTES

I linked plugin-dev and ran sf dev convert script --script test/commands/dev/convert/samples/script.sh

• 🟢 Multiline commands render correctly
• 🟡 sf force:source:deploy turning into sf force source deploy
  • Shouldn't this be sf project deploy start
• 🟡 Multi-line commands lose trailing padding

# multi line commands
sfdx force:user:create -f config/user-def.json \
  -a myuser \
  -o myorg

sfdx alias:set user=myuser

turns into:

# multi line commands
sf org create user --definition-file config/user-def.json \
 --set-alias myuser \
 --target-org myorg 
sf alias set user=myuser

• 🟡 Running the command multiple times will turn multiline commands to a single line
  • sf org create user --definition-file config/user-def.json \--set-alias myuser \--target-org myorgsf alias set user=myuser
• 🟡 If the final command is a unconvertible multi-line command, it will end with undefined

sf force org create \
  --definitionfile config/project-scratch-def.json \
  --setalias myorg \
  --setdefaultusername \
  --durationdays 1

turns into:

sf force org create \
 --definitionfile config/project-scratch-def.json \
 --setalias myorg \
 --setdefaultusername \
 --durationdays 1undefined # <- note "undefined"

• 🟡 Also the indentation is wrong post convert on this previous example ^
  • The indentation goes from 2 spaces to 1

[iowillhoit]

See QA notes. I will push the additional commands i was using for testing

[iowillhoit]

QA UPDATE

• 🟡 sf force:source:deploy is now turning into sf force source deploy, but the # ERROR: Unable to convert this command; you must convert it manually. warning is still getting added to the command?
• 🟢 Multi-line commands padding looks good now!
• 🟢 Running the command multiple times no longer turns a multiline commands into single line
• 🟢 End of file undefined no longer happening
• 🟢 Multiline indentation is now preserved