esp8266/README.md: Typo fix.

7e5715a6 · Paul Sokolovsky · 6f3b9933 · 7e5715a6
Commit 7e5715a6 authored 8 years ago by Paul Sokolovsky
--- a/esp8266/README.md
+++ b/esp8266/README.md
@@ -52,7 +52,7 @@ MicroPython to your module for the first time, or after installing any other
 firmware, you should erase flash completely:

 ```
-esptool.py --port /dev//ttyXXX erase_flash
+esptool.py --port /dev/ttyXXX erase_flash
 ```

 Erase flash also as a troubleshooting measure, if a module doesn't behave as