Fix "sync_git_repo_from_pc1_to_pc2.sh" script's usage of printf

[ElectricRCAircraftGuy]

Apparently you should never pass variables containing arbitrary text to printf as part of the format string, because if they contain any % characters, printf will try to interpret them as a format sequence for a following variable, and will throw an error. Instead, pass variables to printf only as arguments required by a manually-specified format string.

Ex: use

printf '%s\n%s\n%s\n' "$text_foo" "$text_bar" "$baz"

OR (same thing apparently)

printf '%s\n' "$text_foo" "$text_bar" "$baz"

Instead of:

printf "${text_foo}\n${text_bar}\n${baz}"

See the comments under my answer here: https://stackoverflow.com/questions/29933349/how-can-i-make-git-commit-messages-divide-into-multiple-lines/60826932#60826932

and also do some googling on how to properly use variables in bash printf statements.