[riot-notifications] [RIOT-OS/RIOT] cpu/esp32: Use awk/printf instead of echo -n when flashing esp32 (#12282)

Gaëtan Harter notifications at github.com
Fri Sep 20 18:11:10 CEST 2019


This changes the behavior as it removes the first newline. Not sure it is required but it was removed as a side effect.
Also from the semantics, before it was separated that `awk` was only used to query the size from `ls` and could be replaced by `stat --printf=%s $(FLASHFILE).bin` to do it in only one shell call or something, where now it is used to generate the output too.

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