Change wording of explanation about precision & scale of decimal numbers [ci skip]

activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb

@@ -102,8 +102,8 @@ def [](name)
       # * <tt>:index</tt> -
       #   Create an index for the column. Can be either <tt>true</tt> or an options hash.
       #
-      # For clarity's sake: the precision is the number of significant digits,
-      # while the scale is the number of digits that can be stored following
+      # Note: The precision is the total number of significant digits
+      # and the scale is the number of digits that can be stored following
       # the decimal point. For example, the number 123.45 has a precision of 5
       # and a scale of 2. A decimal with a precision of 5 and a scale of 2 can
       # range from -999.99 to 999.99.