From 49e1a3e6c7b756763e6a7d2f1ea33d23a5c9da04 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 20 Nov 2018 15:53:00 +0200
Subject: Escape more line-leading characters in man output

Failed that, groff will treat them as macros/special.
---
 cli/man.cxx | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/cli/man.cxx b/cli/man.cxx
index 6babdf1..b3cf922 100644
--- a/cli/man.cxx
+++ b/cli/man.cxx
@@ -12,15 +12,24 @@ using namespace std;
 
 namespace
 {
+  // According to groff_mdoc(7), groff may have issues with any of the
+  // following characters at the beginning of the line:
+  //
+  // {}+-/*%<>=,&`'"
+  //
+  // Plus, escaping leading '.' with '\' is not sufficient.
+  //
+  static const string escape ("{}+-/*%<>=,&`'\"");
+
   static string
   escape_line (const string& s, size_t b, size_t e)
   {
     string r;
     size_t n (e - b);
 
-    // Escaping leading '.' with '\' is not sufficient.
-    //
-    if (n > 1 && s[b] == '\\' && s[b + 1] == '.')
+
+    if (escape.find (s[b]) != string::npos       ||
+        (n > 1 && s[b] == '\\' && s[b + 1] == '.'))
       r = "\\&";
 
     r.append (s, b, n);
-- 
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