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Constructive Editing (DnD Guideline)
From D&D Wiki
This page is a resource to help new users learn how to edit pages constructively to help improve the content.
Spelling and Grammar
When you see an obvious spelling or grammar mistake on a page, you are encouraged to change it. D&D Wiki uses American standards for spelling and grammar as well as a few quirks for emphasizing text (such as bolding and italics).
Most of the time fixing spelling/grammar errors should not be a problem, but make sure it does not change the mechanics of the sentence.
For example: "10 damage minimum damage from axes by this skill" should not become "All axes deal over 10 damage when using this skill". The mechanic was at least 10 damage, not over 10 damage. Though this is a trivial example, sometimes it is best to ask the author their intention on the talk page.
Generally, it is good to fix mechanics to do what they were intended to do, but bad wording was preventing. Users will usually thank you for helping them get a clearer wording.
You can change game mechanics, but you should ask the author of the page on the talk page, also sending a Message of Interest, before making any major changes. Pages can always be reverted, so if you want, you can just change it without asking. For a page that is new or has had a lot of work put into it, it is much more polite to ask first.
Shouldn't the breath weapon be a cone not a burst?
Sometimes disputes may happen between you and the author on the talk page about changes you have made. The original author's wishes should be used on the page (though feel free to discuss why you changed it to what it is). You can help the author by reverting any changes you have made if necessary. Try not to be offended if the author does not see things the way you do.
If you really like the new changes you have made, you can always make a new page and say that it is a modified version of another person's page. For example, Half-Orc, from R.M.G.C.L.F. (DnD Race) is a variant on the SRD Half-orc.
Above all else, be rational and think of disputes as a discussion, not an argument.
Try to follow the other guidelines presented in the DnD_Guidelines section. In particular, if you are editing a class use the guidelines presented on the Character Class Design Guidelines page; if you are editing a monster/NPC, consider taking a look at the CR Estimation Table...