Fix a small bug with to_s.

Author: wyhaines

shard.yml

@@ -1,5 +1,5 @@
 name: csuuid
-version: 0.2.2
+version: 0.2.3
 
 authors:
   - Kirk Haines <[email protected]>

spec/csuuid_spec.cr

@@ -8,6 +8,11 @@ describe CSUUID do
     uuid.to_s.should match CHECKUUID
   end
 
+  it "to_s should function correctly" do
+    uuid = CSUUID.new
+    uuid.to_s.should eq "#{uuid}"
+  end
+
   it "creates a UUID from another UUID" do
     uuid_1 = CSUUID.new
     uuid_2 = CSUUID.new(uuid_1)

src/csuuid.cr

@@ -40,7 +40,7 @@ require "crystal/spin_lock"
 # ```
 #
 struct CSUUID
-  VERSION = "0.2.2"
+  VERSION = "0.2.3"
 
   @@mutex = Crystal::SpinLock.new
   # @@mutex = Mutex.new(protection: Mutex::Protection::Reentrant)
@@ -164,8 +164,8 @@ struct CSUUID
   end
 
   # Return the String representation of the UUID.
-  def to_s : String
+  def to_s(io : IO) : Nil
     hs = @bytes.hexstring
-    "#{hs[0..7]}-#{hs[8..11]}-#{hs[12..15]}-#{hs[16..19]}-#{hs[20..31]}"
+    io << "#{hs[0..7]}-#{hs[8..11]}-#{hs[12..15]}-#{hs[16..19]}-#{hs[20..31]}"
   end
 end