Fix semvar normalizer

lib/semver_normalizer.rb

@@ -2,14 +2,18 @@
 # For example, "v3.4-20181225" gets normalized to "3.4.20181225".
 # We have to normalize because +Semverse::Version+ requires version tags to be of the form "x.y.z".
 
+# ("1.2.3-rc.1+build.1") => #<Version: @major=1, @minor=2, @patch=3, @pre_release='rc.1', @build='build.1'>
+
 class SemverNormalizer
   def self.call(tag)
     return tag unless tag
 
     tag
       .to_s
-      .strip
-      .sub(/\Av/i, '')       # strip off any leading 'v'
-      .gsub(/[-_]/, '.')     # convert hyphens and underscores to dots
+      .strip # strip off any leading or trailing /t or /n or spaces
+      .sub(/\Av/i, '') # strip off any leading 'v'
+      .strip # strip any spaces after removing "v"
+      # stripping hypends and underscores substantially changes the version string
+      #.gsub(/[-_]/, '.')     # convert hyphens and underscores to dots
   end
 end

spec/lib/semver_normalizer_spec.rb

@@ -12,16 +12,17 @@
 
     it 'strips off any leading "v" character' do
       expect(subject.call("v790")).to eq '790'
-      expect(subject.call("V097")).to eq '097'
+      expect(subject.call("V097.1.0")).to eq '097.1.0'
+      expect(subject.call("V 097.1.0")).to eq '097.1.0'
     end
 
     it 'strips any leading and trailing whitespace' do
-      expect(subject.call("\t\nv790  ")).to eq '790'
+      expect(subject.call("\t\nv790.1.0  ")).to eq '790.1.0'
     end
 
-    it 'replaces pseudo dots with dots' do
-      expect(subject.call("v7-0_9.0")).to eq '7.0.9.0'
-      expect(subject.call("V0.9-7_1")).to eq '0.9.7.1'
+    it 'does not replace underscore or hypen' do
+      expect(subject.call("v7.1.0-pre")).to eq '7.1.0-pre'
+      expect(subject.call("V0.9.1-7_1")).to eq '0.9.1-7_1'
     end
   end
 end