i18n: builtin/pull.c: split strings marked for translation

i18n: builtin/pull.c: split strings marked for translation

Split string "If you wish to set tracking information
for this branch you can do so with:\n" to match occurring string in
git-parse-remote.sh. In this case, the translator handles it only once.

On the other hand, the translations of the string that were already made
are mark as fuzzy and the translator needs to correct it herself.

Signed-off-by: Vasco Almeida <redacted>
Signed-off-by: Junio C Hamano <redacted>