Dmitry Vyukov fcb219b67e all: don't compare string len with 0
For strings it's more readable to compare the string itself with "",
instead of comparing len with 0. Fix all such cases.

Update #1876
2020-07-04 15:05:30 +02:00
..
2020-07-04 15:05:30 +02:00
2020-06-11 23:19:34 +02:00