Fix documentation on svg method

lib/squib/api/image.rb

@@ -46,8 +46,11 @@ module Squib
     # Renders an entire svg file at the given location. Uses the SVG-specified units and DPI to determine the pixel width and height.  If neither data nor file are specified for a given card, this method does nothing.
     #
     # See {file:samples/load-images.rb samples/load-images.rb} and {file:samples/tgc-overlay.rb samples/tgc-overlay.rb} as examples.
+    #
+    # Note: if alpha transparency is desired, set that in the SVG.
+    #
     # @example
-    #   svg 1..2, 'icon.svg', '#stone', x: 50, y:50
+    #   svg range: 1..2, file: 'icon.svg', id: '#stone', x: 50, y:50
     #
     # @option opts range [Enumerable, :all] (:all) the range of cards over which this will be rendered. See {file:README.md#Specifying_Ranges Specifying Ranges}
     # @option opts file [String] ('') file(s) to read in. If it's a single file, then it's use for every card in range. If the parameter is an Array of files, then each file is looked up for each card. If any of them are nil or '', nothing is done. See {file:README.md#Specifying_Files Specifying Files}. Supports Arrays, see {file:README.md#Arrays_and_Singleton_Expansion Arrays and Singleon Expansion}
@@ -59,7 +62,6 @@ module Squib
     # @option opts width [Integer] (:native) the pixel width that the image should scale to. SVG scaling is done with vectors, so the scaling should be smooth. When set to `:native`, uses the DPI and units of the loaded SVG document. Supports Arrays, see {file:README.md#Arrays_and_Singleton_Expansion Arrays and Singleon Expansion}. Supports Unit Conversion, see {file:README.md#Units Units}.
     # @option opts height [Integer] (:native) the pixel width that the image should scale to. SVG scaling is done with vectors, so the scaling should be smooth. When set to `:native`, uses the DPI and units of the loaded SVG document. Supports Arrays, see {file:README.md#Arrays_and_Singleton_Expansion Arrays and Singleon Expansion}. Supports Unit Conversion, see {file:README.md#Units Units}.
     # @option opts layout [String, Symbol] (nil) entry in the layout to use as defaults for this command. See {file:README.md#Custom_Layouts Custom Layouts}. Supports Arrays, see {file:README.md#Arrays_and_Singleton_Expansion Arrays and Singleon Expansion}
-    # @option opts alpha [Decimal] (1.0) the alpha-transparency percentage used to blend this image. Supports Arrays, see {file:README.md#Arrays_and_Singleton_Expansion Arrays and Singleon Expansion}
     # @option opts blend [:none, :multiply, :screen, :overlay, :darken, :lighten, :color_dodge, :color_burn, :hard_light, :soft_light, :difference, :exclusion, :hsl_hue, :hsl_saturation, :hsl_color, :hsl_luminosity] (:none) the composite blend operator used when applying this image. See Blend Modes at http://cairographics.org/operators. Supports Arrays, see {file:README.md#Arrays_and_Singleton_Expansion Arrays and Singleon Expansion}
     # @option opts angle [FixNum] (0) Rotation of the in radians. Note that this rotates around the upper-left corner, making the placement of x-y coordinates slightly tricky. Supports Arrays, see {file:README.md#Arrays_and_Singleton_Expansion Arrays and Singleon Expansion}
     # @option opts mask [String] (nil) If specified, the image will be used as a mask for the given color/gradient. Transparent pixels are ignored, opaque pixels are the given color. Note: the origin for gradient coordinates is at the given x,y, not at 0,0 as it is most other places.