diff --git a/Cargo.lock b/Cargo.lock
index be3ef36..628e461 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -319,6 +319,26 @@ dependencies = [
  "unicode-normalization 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "indoc"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "indoc-impl 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro-hack 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "indoc-impl"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro-hack 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unindent 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "infer_schema_internals"
 version = "1.0.0-beta1"
@@ -554,6 +574,19 @@ name = "pkg-config"
 version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "proc-macro-hack"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "proc-macro-hack-impl 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "proc-macro-hack-impl"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "pulldown-cmark"
 version = "0.1.0"
@@ -663,6 +696,7 @@ dependencies = [
  "futures 0.1.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures-cpupool 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper 0.11.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "indoc 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "libsqlite3-sys 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "maplit 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -955,6 +989,11 @@ name = "unidecode"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "unindent"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "unreachable"
 version = "1.0.0"
@@ -1067,6 +1106,8 @@ dependencies = [
 "checksum httparse 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "af2f2dd97457e8fb1ae7c5a420db346af389926e36f43768b96f101546b04a07"
 "checksum hyper 0.11.9 (registry+https://github.com/rust-lang/crates.io-index)" = "e0594792d2109069d0caffd176f674d770a84adf024c5bb48e686b1ee5ac7659"
 "checksum idna 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "014b298351066f1512874135335d62a789ffe78a9974f94b43ed5621951eaf7d"
+"checksum indoc 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "1728ee8a2e45f6dc2843585160d1c7c14950abd3f9d23f854b9b2d6ff8b2379e"
+"checksum indoc-impl 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "a4d87d10be98219365f73f997c1c3a0b12c7be2c6b505211c9b062bd23763aae"
 "checksum infer_schema_internals 1.0.0-beta1 (registry+https://github.com/rust-lang/crates.io-index)" = "612223b7e3f3d91f2e37007140001c110611672024ffa20e8d0a2e650e01fb3d"
 "checksum infer_schema_macros 1.0.0-beta1 (registry+https://github.com/rust-lang/crates.io-index)" = "ee7447ac27f01f224a6fae696480a803a5c5779971b254d728c3486885198677"
 "checksum iovec 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "b6e8b9c2247fcf6c6a1151f1156932be5606c9fd6f55a2d7f9fc1cb29386b2f7"
@@ -1098,6 +1139,8 @@ dependencies = [
 "checksum num_cpus 1.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "514f0d73e64be53ff320680ca671b64fe3fb91da01e1ae2ddc99eb51d453b20d"
 "checksum percent-encoding 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "31010dd2e1ac33d5b46a5b413495239882813e0369f8ed8a5e266f173602f831"
 "checksum pkg-config 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "3a8b4c6b8165cd1a1cd4b9b120978131389f64bdaf456435caa41e630edba903"
+"checksum proc-macro-hack 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3ba8d4f9257b85eb6cdf13f055cea3190520aab1409ca2ab43493ea4820c25f0"
+"checksum proc-macro-hack-impl 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d5cb6f960ad471404618e9817c0e5d10b1ae74cfdf01fab89ea0641fe7fb2892"
 "checksum pulldown-cmark 0.1.0 (git+https://github.com/maghoff/pulldown-cmark.git)" = "<none>"
 "checksum quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e920b65c65f10b2ae65c831a81a073a89edd28c7cce89475bff467ab4167a"
 "checksum r2d2 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "59611202bee496c586ecd84e3ed149b4ec75981b0fc10d7f60e878fa23ae16e9"
@@ -1143,6 +1186,7 @@ dependencies = [
 "checksum unicode-width 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "bf3a113775714a22dcb774d8ea3655c53a32debae63a063acc00a91cc586245f"
 "checksum unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "8c1f860d7d29cf02cb2f3f359fd35991af3d30bac52c57d265a3c461074cb4dc"
 "checksum unidecode 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d2adb95ee07cd579ed18131f2d9e7a17c25a4b76022935c7f2460d2bfae89fd2"
+"checksum unindent 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "10743f62eafa8863b3dbb35cd6abbb609c963dd98940142a85bc530b753e33a4"
 "checksum unreachable 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "382810877fe448991dfc7f0dd6e3ae5d58088fd0ea5e35189655f84e6814fa56"
 "checksum url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fa35e768d4daf1d85733418a49fb42e10d7f633e394fccab4ab7aba897053fe2"
 "checksum utf8-ranges 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "662fab6525a98beff2921d7f61a39e7d59e0b425ebc7d0d9e66d316e55124122"
diff --git a/Cargo.toml b/Cargo.toml
index c47c48f..d68620a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -9,6 +9,7 @@ license = "GPL-3.0"
 panic = "abort"
 
 [dev-dependencies]
+indoc = "0.2"
 matches = "0.1"
 
 [dependencies]
diff --git a/src/lib.rs b/src/lib.rs
index 094b672..4bd08a1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,6 +1,7 @@
 #![recursion_limit="128"] // for diesel's infer_schema!
 
 #[cfg(test)] #[macro_use] extern crate matches;
+#[cfg(test)] #[macro_use] extern crate indoc;
 
 #[macro_use] extern crate bart_derive;
 #[macro_use] extern crate codegen;
diff --git a/src/merge/mod.rs b/src/merge/mod.rs
index a2f136f..cd907a2 100644
--- a/src/merge/mod.rs
+++ b/src/merge/mod.rs
@@ -95,8 +95,8 @@ pub fn merge_lines<'a>(a: &'a str, o: &'a str, b: &'a str) -> MergeResult<&'a st
                     Resolved(y) => y.into_iter(),
                     _ => unreachable!()
                 })
-                .flat_map(|x| vec![x, "\n"].into_iter())
-                .collect()
+                .collect::<Vec<_>>()
+                .join("\n")
         )
     } else {
         MergeResult::Conflicted(hunks)
@@ -160,16 +160,30 @@ mod test {
 
     #[test]
     fn clean_case() {
-        assert_eq!(MergeResult::Clean("\
-            aaa\n\
-            xxx\n\
-            bbb\n\
-            yyy\n\
-            ccc\n\
-        ".into()), merge_lines(
-            "aaa\nxxx\nbbb\nccc\n",
-            "aaa\nbbb\nccc\n",
-            "aaa\nbbb\nyyy\nccc\n",
+        assert_eq!(MergeResult::Clean(indoc!("
+            aaa
+            xxx
+            bbb
+            yyy
+            ccc
+        ").into()), merge_lines(
+            indoc!("
+                aaa
+                xxx
+                bbb
+                ccc
+            "), 
+            indoc!("
+                aaa
+                bbb
+                ccc
+            "),
+            indoc!("
+                aaa
+                bbb
+                yyy
+                ccc
+            "),
         ));
     }
 
@@ -184,14 +198,26 @@ mod test {
 
     #[test]
     fn false_conflict() {
-        assert_eq!(MergeResult::Clean("\
-            aaa\n\
-            xxx\n\
-            ccc\n\
-        ".into()), merge_lines(
-            "aaa\nxxx\nccc\n",
-            "aaa\nbbb\nccc\n",
-            "aaa\nxxx\nccc\n",
+        assert_eq!(MergeResult::Clean(indoc!("
+            aaa
+            xxx
+            ccc
+        ").into()), merge_lines(
+            indoc!("
+                aaa
+                xxx
+                ccc
+            "), 
+            indoc!("
+                aaa
+                bbb
+                ccc
+            "),
+            indoc!("
+                aaa
+                xxx
+                ccc
+            "),
         ));
     }
 
@@ -200,11 +226,25 @@ mod test {
         assert_eq!(MergeResult::Conflicted(vec![
             Resolved(vec!["aaa"]),
             Conflict(vec!["xxx"], vec![], vec!["yyy"]),
-            Resolved(vec!["bbb", "ccc"]),
+            Resolved(vec!["bbb", "ccc", ""]),
         ]), merge_lines(
-            "aaa\nxxx\nbbb\nccc\n",
-            "aaa\nbbb\nccc\n",
-            "aaa\nyyy\nbbb\nccc\n",
+            indoc!("
+                aaa
+                xxx
+                bbb
+                ccc
+            "), 
+            indoc!("
+                aaa
+                bbb
+                ccc
+            "),
+            indoc!("
+                aaa
+                yyy
+                bbb
+                ccc
+            "),
         ));
     }
 }