docs: improve Accordion icon content settings documentation

See https://github.com/zurb/foundation-sites/pull/11025/files#r173287607

diff --git a/scss/components/_accordion.scss b/scss/components/_accordion.scss
index 3661f1142a75642a4eb7a64836027eb10ba08581..09a3493415f687e0fcbe2a1d78a26886678ddf53 100644 (file)
--- a/scss/components/_accordion.scss
+++ b/scss/components/_accordion.scss
@@ -14,11 +14,11 @@ $accordion-background: $white !default;
 /// @type Boolean
 $accordion-plusminus: true !default;
 
-/// Default indicator for plus when $accordion-plusminus is true
+/// Content for the plus icon when `$accordion-plusminus` is `true`
 /// @type String
 $accordion-plus-content: '\002B' !default;
 
-/// Default indicator for minus when $accordion-plusminus is true
+/// Content for the minus icon when `$accordion-plusminus` is `true`
 /// @type String
 $accordion-minus-content: '\2013' !default;