docs: Makes core dump's documentation slightly clearer
Merges
@@ -63,6 +63,8 @@ Base64-encoded body of core dump will be between the following header and footer
<body of base64-encoded core dump, save it to file on disk>
================= CORE DUMP END ===================
+The `CORE DUMP START` and `CORE DUMP END` lines must not be included in core dump text file.
+
Running 'espcoredump.py'
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