help output cleanup for help2man

- Don't put paths in parentheses, as help2man won't recognize and italicize
them.

- Don't use paths in examples as they get italicized, which looks bad.

- Use better spacing in the examples so that they show up on separate lines.
Include the sys_rc_path in conda info --json
Don't put newline after examples header

help2man doesn't recognize it as a header otherwise
Put parens around conda config --help paths back

It doesn't seem to make help2man italicize the names any better.
Fix undefined name error in main_remove
Merge branch 'master' into fix/conda-config-rc

Conflicts:
	conda/cli/main_config.py
Add user rc path to conda config --file help