Merge pull request #1302 from linsword13/docs

Add mentions of upper and lower in docs

Author: douglasjacobsen

lib/ramble/docs/workspace_config.rst

@@ -184,6 +184,8 @@ Supported functions are:
 * ``randint`` (from `random.randint`)
 * ``join_str(iterable, sep=",")`` (concatenate iterable into ``sep``-separated string)
 * ``re_search(regex, str)`` (determine if ``str`` contains pattern ``regex``, based on ``re.search``)
+* ``upper_str(str)`` (convert ``str`` to uppercase)
+* ``lower_str(str)`` (convert ``str`` to lowercase)
 * ``maybe(var_name, default="")`` (returns the expanded ``var_name`` if it is defined, otherwise returns ``default``)
 
 Besides the above listed, any functions from the ``math`` module can be used in Ramble by referencing ``math_<function_name>``.