(problib) improve toString funcs

Author: MatthijsBurgh

problib/src/pdfs/Mixture.cpp

@@ -170,7 +170,7 @@ std::string Mixture::toString(const std::string& indent) const {
 	ss << "MIX{\n";
 	std::vector<double>::const_iterator it_w = ptr_->weights_.begin();
 	for (std::vector<PDF*>::const_iterator it_pdf = ptr_->components_.begin(); it_pdf != ptr_->components_.end(); ++it_pdf) {
-		ss << new_indent << (*it_w) << " : " << (*it_pdf)->toString(new_indent) << "\n";
+		ss << new_indent << (*it_w) << ": " << (*it_pdf)->toString(new_indent) << "\n";
 		++it_w;
 	}
 	ss << indent << "}";

problib/src/pdfs/PMF.cpp

@@ -292,7 +292,7 @@ double PMF::getMaxDensity() const {
 
 std::string PMF::toString(const std::string& /*indent*/) const {
 	std::stringstream ss;
-	ss << indent << "PMF(" << ptr_->domain_size_ << ")[";
+	ss << "PMF(" << ptr_->domain_size_ << ")[";
 
 	std::map<std::string, double>::const_iterator it = ptr_->pmf_.begin();
 	if (it != ptr_->pmf_.end()) {

problib/src/pdfs/Uniform.cpp

@@ -156,7 +156,7 @@ std::string Uniform::toString(const std::string& /*indent*/) const {
     s << "U(" << uniform_probability_;
 
     if (size_is_set_) {
-        s << ", mean = " << mean_ << ", size = " << size_;
+        s << ", mean =\n" << mean_ << ", size =\n" << size_;
     }
 
     s << ")";