From a0d848da8d70933f39119415647552c88e3beaf4 Mon Sep 17 00:00:00 2001
From: Maxime Coste <mawww@kakoune.org>
Date: Wed, 7 Jun 2017 13:09:45 +0100
Subject: [PATCH] Do not allow whitespaces as % string delimiters

---
 src/command_manager.cc | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/command_manager.cc b/src/command_manager.cc
index fa7a5044..fc615078 100644
--- a/src/command_manager.cc
+++ b/src/command_manager.cc
@@ -210,11 +210,13 @@ Token parse_percent_token(Reader& reader)
         ++reader;
     StringView type_name = reader.substr_from(type_start);
 
-    if (throw_on_unterminated and not reader)
-        throw parse_error{format("expected a string delimiter after '%{}'",
-                                 type_name)};
-    else if (not reader)
+    if (not reader or is_blank(*reader))
+    {
+        if (throw_on_unterminated)
+            throw parse_error{format("expected a string delimiter after '%{}'",
+                                     type_name)};
         return {};
+    }
 
     Token::Type type = token_type<throw_on_unterminated>(type_name);