Swap label and expected value parameters

This matches the partial initializer parameters.
Also cleaned up some code in the Expectation spec.

src/spectator/matchers/range_matcher.cr

@@ -47,19 +47,19 @@ module Spectator::Matchers
       lower = center - diff
       upper = center + diff
       range = Range.new(lower, upper)
-      RangeMatcher.new("#{center} +/- #{label}", range)
+      RangeMatcher.new(range, "#{center} +/- #{label}")
     end
 
     # Returns a new matcher, with the same bounds, but uses an inclusive range.
     def inclusive
       range = Range.new(@expected.begin, @expected.end, exclusive: false)
-      RangeMatcher.new(label + " (inclusive)", range)
+      RangeMatcher.new(range, label + " (inclusive)")
     end
 
     # Returns a new matcher, with the same bounds, but uses an exclusive range.
     def exclusive
       range = Range.new(@expected.begin, @expected.end, exclusive: true)
-      RangeMatcher.new(label + " (exclusive)", range)
+      RangeMatcher.new(range, label + " (exclusive)")
     end
   end
 end

src/spectator/matchers/value_matcher.cr

@@ -17,14 +17,14 @@ module Spectator::Matchers
     # Creates the value matcher.
     # The label should be a string representation of the expectation.
     # The expected value is stored for later use.
-    def initialize(@label : String, @expected : ExpectedType)
+    def initialize(@expected : ExpectedType, @label : String)
     end
 
     # Creates the value matcher.
     # The label is generated by calling `#to_s` on the expected value.
     # The expected value is stored for later use.
     def initialize(expected : ExpectedType)
-      initialize(expected.to_s, expected)
+      initialize(expected, expected.to_s)
     end
   end
 end