Update src/west/app/config.py

Co-authored-by: Marc Herbert <[email protected]>

Author: carlescufi

src/west/app/config.py

@@ -53,7 +53,7 @@
 A value must exist in the selected configuration file in order to be able
 to append to it. The existing value can be empty.
 Examples:
-    west config -a build.cmake-args -- "-DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
+    west config -a build.cmake-args -- "  -DEXTRA_CFLAGS='-Wextra -g0' -DFOO=BAR"
             -DCMAKE_VERBOSE_MAKEFILE=ON"
     west config -a manifest.group-filter ,+optional