- "Specify appearance of fringes on all frames.
-This variable can be nil (the default) meaning the fringes should have
-the default width (8 pixels), it can be an integer value specifying
-the width of both left and right fringe (where 0 means no fringe), or
-a cons cell where car indicates width of left fringe and cdr indicates
-width of right fringe (where again 0 can be used to indicate no
-fringe).
-Note that the actual width may be rounded up to ensure that the sum of
-the width of the left and right fringes is a multiple of the frame's
-character width. However, a fringe width of 0 is never rounded.
-To set this variable in a Lisp program, use `set-fringe-mode' to make
-it take real effect.
-Setting the variable with a customization buffer also takes effect.
-If you only want to modify the appearance of the fringe in one frame,
-you can use the interactive function `set-fringe-style'."
+ "Default appearance of fringes on all frames.
+The Lisp value should be one of the following:
+- nil, which means the default width (8 pixels).
+- a cons cell (LEFT . RIGHT), where LEFT and RIGHT are
+ respectively the left and right fringe widths in pixels, or
+ nil (meaning the default width).
+- a single integer, which specifies the pixel widths of both
+ fringes.
+Note that the actual width may be rounded up to ensure that the
+sum of the width of the left and right fringes is a multiple of
+the frame's character width. However, a fringe width of 0 is
+never rounded.
+
+When setting this variable from Customize, the user can choose
+from the mnemonic fringe mode names defined in `fringe-styles'.
+
+When setting this variable in a Lisp program, call
+`set-fringe-mode' afterward to make it take real effect.
+
+To modify the appearance of the fringe in a specific frame, use
+the interactive function `set-fringe-style'."