Added warning about non-list parameters to placeholders with join del…

…imiters.

TemplatedProject.go

@@ -34,6 +34,7 @@ type TemplatedProject struct {
 	rootDirectory string
 
 	missingParameters StringSet
+	incorrectParameters StringSet
 }
 
 /*
@@ -262,6 +263,10 @@ func (this *TemplatedProject) replaceStringParameters(input string, parameters m
 				this.missingParameters.Add(parameterName)
 			} else {
 
+				if(len(parameterValues) == 1) {
+					this.incorrectParameters.Add(parameterName)
+				}
+
 				sequence = strings.Join(parameterValues, separator)
 				resultBuffer.WriteString(sequence)
 			}

main.go

@@ -131,6 +131,16 @@ func createProject(settings RunSettings, registry *TemplateRegistry) {
 			fmt.Println(value)
 		}
 	}
+
+	if project.incorrectParameters.Length() > 0 {
+
+		fmt.Println("Project generated, but some placeholders in the template were specified with a join character ('[]'), but the given parameter was not a list")
+		fmt.Println("This may mean you need to specify the following parameters as a comma-separated list")
+
+		for _, value := range project.incorrectParameters.GetSlice() {
+			fmt.Println(value)
+		}
+	}
 }
 
 func exitWith(message string, err error, code int) {