Fix warning and ambiguity.

Hate XCode for its dumbass settings.

cli.xcodeproj/project.pbxproj

@@ -65,6 +65,13 @@
 			remoteGlobalIDString = CD266886252FFAAE00B3E667;
 			remoteInfo = "string_utils-test";
 		};
+		CDF978A9253253D500204B5C /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = CDC748EA25314195008D9D1D /* string-utils.xcodeproj */;
+			proxyType = 1;
+			remoteGlobalIDString = CD266861252FF4B600B3E667;
+			remoteInfo = "string-utils";
+		};
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
@@ -199,6 +206,7 @@
 			buildRules = (
 			);
 			dependencies = (
+				CDF978AA253253D500204B5C /* PBXTargetDependency */,
 			);
 			name = cli;
 			productName = cli;
@@ -350,6 +358,11 @@
 			target = CDC748A42531353C008D9D1D /* cli */;
 			targetProxy = CDC748C825313592008D9D1D /* PBXContainerItemProxy */;
 		};
+		CDF978AA253253D500204B5C /* PBXTargetDependency */ = {
+			isa = PBXTargetDependency;
+			name = "string-utils";
+			targetProxy = CDF978A9253253D500204B5C /* PBXContainerItemProxy */;
+		};
 /* End PBXTargetDependency section */
 
 /* Begin XCBuildConfiguration section */

include/cli/prompt.h

@@ -30,7 +30,7 @@ public:
     while (true) {
       input_prompt_->print(std::cout);
       std::string data;
-      if (!std::getline(in, data, '\n') || data.empty()) {
+      if (!std::getline(in, data) || data.empty()) {
         break;
       }
       std::stringstream ss{data};