fix snippet string argument extraction followed by non space character

features/snippets.feature

@@ -92,3 +92,29 @@ Feature: undefined step snippets
               s.Step(`^the project should be there$`, theProjectShouldBeThere)
       }
       """
+
+  Scenario: should handle string argument followed by comma
+    Given a feature "undefined.feature" file:
+      """
+      Feature: undefined
+
+        Scenario: add item to basket
+          Given there is a "Sith Lord Lightsaber", which costs £5
+          When I add the "Sith Lord Lightsaber" to the basket
+      """
+    When I run feature suite
+    And the undefined step snippets should be:
+      """
+      func thereIsAWhichCosts(arg1 string, arg2 int) error {
+              return godog.ErrPending
+      }
+
+      func iAddTheToTheBasket(arg1 string) error {
+              return godog.ErrPending
+      }
+
+      func FeatureContext(s *godog.Suite) {
+              s.Step(`^there is a "([^"]*)", which costs £(\d+)$`, thereIsAWhichCosts)
+              s.Step(`^I add the "([^"]*)" to the basket$`, iAddTheToTheBasket)
+      }
+      """

fmt.go

@@ -15,7 +15,9 @@ import (
 
 // some snippet formatting regexps
 var snippetExprCleanup = regexp.MustCompile("([\\/\\[\\]\\(\\)\\\\^\\$\\.\\|\\?\\*\\+\\'])")
-var snippetExprQuoted = regexp.MustCompile("(\\s*|^)\"(?:[^\"]*)\"(\\s+|$)")
+
+// var snippetExprQuoted = regexp.MustCompile("(\\s*|^)\"(?:[^\"]*)\"(\\s+|,|:|\\.|$)")
+var snippetExprQuoted = regexp.MustCompile("(\\W|^)\"(?:[^\"]*)\"(\\W|$)")
 var snippetMethodName = regexp.MustCompile("[^a-zA-Z\\_\\ ]")
 var snippetNumbers = regexp.MustCompile("(\\d+)")
 
@@ -346,7 +348,7 @@ func (f *basefmt) snippets() string {
 	for _, u := range f.undefined {
 		expr := snippetExprCleanup.ReplaceAllString(u.step.Text, "\\$1")
 		expr = snippetNumbers.ReplaceAllString(expr, "(\\d+)")
-		expr = snippetExprQuoted.ReplaceAllString(expr, " \"([^\"]*)\" ")
+		expr = snippetExprQuoted.ReplaceAllString(expr, "$1\"([^\"]*)\"$2")
 		expr = "^" + strings.TrimSpace(expr) + "$"
 
 		name := snippetNumbers.ReplaceAllString(u.step.Text, " ")