Improve comments in some syntax definitions
Add ##Alerts and ##Modelines in comments and add or fix the <comment .../>
elements of the <comments>
group (of <general>
).
For example, in the comment elements:
- Add the region attribute in comment of type multiLine if it's missing. Folding in multiline comment is also added if missing.
- Add the position attribute in comment of type singleLine in indentation-sensitive languages.
- Remove duplicate comment elements, as only one type singleLine and multiLine are supported.
Also, in some files I corrected the inconsistent indentation and added modelines with the indentation settings (ex: indentation with tabs or with spaces, and the size in the indentation with spaces).