Documentation: Fix errors in doc build

Changes: Fix doc comment issues that generate warnings in the documentation build
	- HTML coding errors
	- Unescaped special characters
	- Misspelled parameter names
	- Missing function parameters
	- References to nonexistent objects
	- Malformed comments
	- Miscellaneous typos
User doc: updated for ks.test

To explain the adjustment made for p-value. This adjustment creates difference from R output.