I am doing it first time. Is it better now?

1. Updating D1249: Advanced selection #
2. Enter a brief description of the changes included in this update.
3. The first line is used as subject, next lines as comment. #
4. If you intended to create a new revision, use:
5. $ arc diff --create

Index: manual/modeling/meshes/selecting/advanced.rst

• manual/modeling/meshes/selecting/advanced.rst

+++ manual/modeling/meshes/selecting/advanced.rst
@@ -18,10 +18,9 @@
Select Every N Number of Vertices

Selects vertices that are multiples of N.

Sharp Edges

• This option will select all edges that are between two faces forming an angle less than a given value,
• which is asked you *via* a small pop-up dialog.
• The lower is this angle limit, the sharper will be the selected edges.
• At `180, **all** :term:manifold` edges will be selected.

+ This option will select all edges that are between two faces forming an angle more than a given value,
+ which is asked you *via* a small pop-up dialog or operator menu in tool shelf (:kbd:T).
+ Whereby increasing angle value will select a sharper edges.
Linked Flat Faces (:kbd:Ctrl-Shift-Alt-F)

Select connected faces based on a threshold of the angle between them.
This is useful for selecting faces that are planar.