Use location instead of source

src/spectator/fail_result.cr

@@ -41,7 +41,7 @@ module Spectator
     # Attempts to retrieve the location where the example failed.
     # This only works if the location of the failed expectation was reported.
     # If available, returns a `Location`, otherwise `nil`.
-    def source : Location?
+    def location : Location?
       return unless error = @error.as?(ExampleFailed)
 
       error.location?

src/spectator/formatting/components/failure_command_list.cr

@@ -15,8 +15,8 @@ module Spectator::Formatting::Components
       io.puts
       @failures.each do |failure|
         # Use failed location if it's available.
-        if (result = failure.result).responds_to?(:source)
-          location = result.source
+        if (result = failure.result).responds_to?(:location)
+          location = result.location
         end
 
         io.puts ExampleCommand.new(failure, location).colorize(:red)

src/spectator/formatting/components/result_block.cr

@@ -48,7 +48,7 @@ module Spectator::Formatting::Components
         subtitle_line(io)
         io.puts
         content(io)
-        source_line(io)
+        location_line(io)
       end
     end
 
@@ -68,16 +68,16 @@ module Spectator::Formatting::Components
       end
     end
 
-    # Produces the (example) source line.
-    private def source_line(io)
-      source = if (result = @example.result).responds_to?(:source)
-                 result.source
-               else
-                 @example.location?
-               end
-      return unless source
+    # Produces the (example) location line.
+    private def location_line(io)
+      location = if (result = @example.result).responds_to?(:location)
+                   result.location
+                 else
+                   @example.location?
+                 end
+      return unless location
 
-      line(io) { io << Comment.colorize(source) }
+      line(io) { io << Comment.colorize(location) }
     end
 
     # Computes the number of spaces the index takes