From 650ea3bd3bac1fa50f9c8566d5def774c5eb2fee Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Sat, 16 Jan 2016 12:28:50 +0200
Subject: Handle newline-only lines in documentation string parser

---
 cli/parser.cxx | 49 ++++++++++++++++++++++++++-----------------------
 1 file changed, 26 insertions(+), 23 deletions(-)

diff --git a/cli/parser.cxx b/cli/parser.cxx
index b63efcb..b10cb0e 100644
--- a/cli/parser.cxx
+++ b/cli/parser.cxx
@@ -1016,36 +1016,39 @@ doc_string (const char* l, size_t n)
         more = false;
       }
 
-      // In the pre mode we only remove up to m leading whitespaces.
-      //
+      if (b != e) // Unless this is just a single newline.
       {
-        size_t i (0);
-        while (b < e &&
-               (t1[b] == 0x20 || t1[b] == 0x0D || t1[b] == 0x09) &&
-               (!pre || i != m))
+        // In the pre mode we only remove up to m leading whitespaces.
+        //
         {
-          ++b;
-          ++i;
-        }
+          size_t i (0);
+          while (b < e &&
+                 (t1[b] == 0x20 || t1[b] == 0x0D || t1[b] == 0x09) &&
+                 (!pre || i != m))
+          {
+            ++b;
+            ++i;
+          }
 
-        if (!pre)
-          m = i;
-      }
+          if (!pre)
+            m = i;
+        }
 
-      --e;
-      while (e > b && (t1[e] == 0x20 || t1[e] == 0x0D || t1[e] == 0x09))
         --e;
+        while (e > b && (t1[e] == 0x20 || t1[e] == 0x0D || t1[e] == 0x09))
+          --e;
 
-      if (b == e && t1[b] == '\\')
-      {
-        // Use Start of Text (0x02) and End of Text (0x03) special
-        // characters as pre-formatted fragment markers.
-        //
-        pre = !pre;
-        t2 += (pre ? 0x02 : 0x03);
+        if (b == e && t1[b] == '\\')
+        {
+          // Use Start of Text (0x02) and End of Text (0x03) special
+          // characters as pre-formatted fragment markers.
+          //
+          pre = !pre;
+          t2 += (pre ? 0x02 : 0x03);
+        }
+        else if (b <= e)
+          t2.append (t1, b, e - b + 1);
       }
-      else if (b <= e)
-        t2.append (t1, b, e - b + 1);
 
       if (more)
       {
-- 
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