Updated device commmands, Update use of \ in CSV files

docs/CSV-Special-Characters.md

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+# CSV Special Characters
+- [Python CSV documentation](https://docs.python.org/3/library/csv.html#dialects-and-formatting-parameters)
+
+## Python variables that control CSV file reading/writing:
+```
+Dialect.delimiter
+    A one-character string used to separate fields.
+    It defaults to ','.
+
+Dialect.doublequote
+    Controls how instances of quotechar appearing inside a field should themselves be quoted.
+    When True, the character is doubled. When False, the escapechar is used as a prefix to the quotechar.
+    It defaults to True.
+
+Dialect.escapechar
+    A one-character string used by the writer to escape the delimiter if quoting is set to QUOTE_NONE and the quotechar if doublequote is False.
+    On reading, the escapechar removes any special meaning from the following character.
+    It defaults to None, which disables escaping.
+
+Dialect.lineterminator
+    The string used to terminate lines produced by the writer.
+    It defaults to '\r\n'.
+
+    The reader is hard-coded to recognise either '\r' or '\n' as end-of-line, and ignores lineterminator.
+
+Dialect.quotechar
+    A one-character string used to quote fields containing special characters, such as the delimiter or quotechar, or which contain new-line characters.
+    It defaults to '"'.
+
+Dialect.quoting
+    Controls when quotes should be generated by the writer and recognised by the reader. It can take on any of the QUOTE_* constants (see section Module Contents).
+    It defaults to QUOTE_MINIMAL.
+```
+
+## GAM variables that control CSV file reading/writing:
+```
+csv_input_column_delimiter = , - Dialect.delimiter
+csv_input_no_escape_char = true - Dialect.escapechar is set to None if true, '\' if false
+csv_input_quote_char = " - Dialect.quotechar
+csv_output_column_delimiter = , - Dialect.delimiter
+csv_output_no_escape_char = false - Dialect.escapechar is set to None if true, '\' if false
+csv_output_line_terminator = lf - Dialect.lineterminator
+csv_output_quote_char = " - Dialect.quotechar
+todrive_no_escape_char = true - Dialect.escapechar is set to None if true, '\' if false
+```
+
+GAM sets Dialect.doublequote to true and Dialect.quoting to QUOTE_MINIMAL; there are no variables to change these values.
+
+## Examples
+
+### Local file, default settings
+With these settings, here are examples of how field values are mapped on output to a local file:
+```
+csv_output_column_delimiter = ,
+csv_output_no_escape_char = false
+csv_output_quote_char = "
+```
+
+| Input | Output |
+|-------|--------|
+| abc def | abc def |
+| abc,def | "abc,def" |
+| abc"def | "abc""def" |
+| abc\def | abc\\\\def |
+
+### Local file, modified settings
+With these settings, here are examples of how field values are mapped on output to a local file:
+```
+csv_output_column_delimiter = ,
+csv_output_no_escape_char = true
+csv_output_quote_char = "
+```
+
+| Input | Output |
+|-------|--------|
+| abc def | abc def |
+| abc,def | "abc,def" |
+| abc"def | "abc""def" |
+| abc\def | abc\def |
+
+### todrive, default settings
+With these settings, here are examples of how field values are mapped on output to todrive
+```
+csv_output_column_delimiter = ,
+todrive_no_escape_char = true
+csv_output_quote_char = "
+```
+
+| Input | Output |
+|-------|--------|
+| abc def | abc def |
+| abc,def | "abc,def" |
+| abc"def | "abc""def" |
+| abc\def | abc\def |