Update comments in sh_spec.py to match the new spec test format (#157)

test/sh_spec.py

@@ -37,7 +37,7 @@

Example test case:

### hello and fail
#### hello and fail
echo hello
echo world
exit 1
@@ -75,8 +75,8 @@ def log(msg, *args):


# EXAMPLES:
# stdout: foo
# stdout-json: ""
## stdout: foo
## stdout-json: ""
#
# In other words, it could be (name, value) or (qualifier, name, value)

@@ -167,13 +167,13 @@ def peek(self):
#
# -- Code is either literal lines, or a commented out code: value.
# code = (? line of code ?)*
#      | '# code:'  VALUE 
#      | '## code:'  VALUE 
#
# -- Description, then key-value pairs surrounding code.
# test_case = '###' DESC
#             ( '#' KEY ':' VALUE )*
# test_case = '####' DESC
#             ( '##' KEY ':' VALUE )*
#             code
#             ( '#' KEY ':' VALUE )*
#             ( '##' KEY ':' VALUE )*
# 
# -- Should be a blank line after each test case.  Leading comments and code
# -- are OK.