From 5f470a0a2a2175f46ea8e486fa1b5e9de2db3192 Mon Sep 17 00:00:00 2001
From: Fredrik Ekre <fredrik.ekre@chalmers.se>
Date: Fri, 10 Aug 2018 17:38:51 +0200
Subject: [PATCH] fix doctest = :fix with empty output

---
 src/DocChecks.jl        | 1 +
 test/doctests/broken.jl | 5 +++++
 test/doctests/broken.md | 5 +++++
 test/doctests/fixed.jl  | 7 +++++++
 test/doctests/fixed.md  | 7 +++++++
 5 files changed, 25 insertions(+)

diff --git a/src/DocChecks.jl b/src/DocChecks.jl
index 25f43cb6ce9..9d74b376769 100644
--- a/src/DocChecks.jl
+++ b/src/DocChecks.jl
@@ -431,6 +431,7 @@ function fix_doctest(result::Result, str, doc::Documents.Document)
     # construct the new code-snippet (without indent)
     # first part: everything up until the last index of the input string
     newcode = code[1:last(inputidx)]
+    isempty(result.output) && (newcode *= '\n') # issue #772
     # second part: the rest, with the old output replaced with the new one
     newcode *= replace(code[nextind(code, last(inputidx)):end], result.output => str, count = 1)
     # replace internal code block with the non-indented new code, needed if we come back
diff --git a/test/doctests/broken.jl b/test/doctests/broken.jl
index b74d141e6c2..9d4e264da56 100644
--- a/test/doctests/broken.jl
+++ b/test/doctests/broken.jl
@@ -70,6 +70,11 @@ Int64[1, 2, 3, 4] * 2
 julia> println("  foobar")
   foobaz
 ```
+```jldoctest
+julia> 1 + 2
+
+julia> 3 + 4
+```
 """
 foo() = 1
 
diff --git a/test/doctests/broken.md b/test/doctests/broken.md
index bff92a71853..aa0ee7d0aa7 100644
--- a/test/doctests/broken.md
+++ b/test/doctests/broken.md
@@ -72,3 +72,8 @@ Int64[1, 2, 3, 4] * 2
 julia> println("  foobar")
   foobaz
 ```
+```jldoctest
+julia> 1 + 2
+
+julia> 3 + 4
+```
\ No newline at end of file
diff --git a/test/doctests/fixed.jl b/test/doctests/fixed.jl
index bb3bac54050..c6852bf8a5c 100644
--- a/test/doctests/fixed.jl
+++ b/test/doctests/fixed.jl
@@ -70,6 +70,13 @@ Int64[1, 2, 3, 4] * 2
 julia> println("  foobar")
   foobar
 ```
+```jldoctest
+julia> 1 + 2
+3
+
+julia> 3 + 4
+7
+```
 """
 foo() = 1
 
diff --git a/test/doctests/fixed.md b/test/doctests/fixed.md
index 85f497e8fe0..c7a87e8be51 100644
--- a/test/doctests/fixed.md
+++ b/test/doctests/fixed.md
@@ -72,3 +72,10 @@ Int64[1, 2, 3, 4] * 2
 julia> println("  foobar")
   foobar
 ```
+```jldoctest
+julia> 1 + 2
+3
+
+julia> 3 + 4
+7
+```
\ No newline at end of file