Improve ~/.ssh/config modification code to not add trailing spaces to lines it cannot parse.

"Host\n" is a valid line, and actually gets parsed ok, but this also holds
for other lines that it fails to parse for some reason.

Utility/SshConfig.hs

@@ -82,7 +82,8 @@ genSshConfig = unlines . concatMap gen
 	gen (GlobalConfig s) = [setting s]
 	gen (HostConfig h cs) = ("Host " ++ h) : map (either comment setting) cs
 
-	setting (SshSetting indent k v) = indent ++ k ++ " " ++ v
+	setting (SshSetting indent k v) = indent ++ k ++ 
+		if null v then "" else " " ++ v
 	comment (Comment indent c) = indent ++ c
 
 findHostConfigKey :: SshConfig -> Key -> Maybe Value

debian/changelog

@@ -8,6 +8,8 @@ git-annex (5.20150917) UNRELEASED; urgency=medium
     In particular, storageclass=STANDARD_IA to use Amazon's
     new Infrequently Accessed storage, and storageclass=NEARLINE
     to use Google's NearLine storage.
+  * Improve ~/.ssh/config modification code to not add trailing spaces
+    to lines it cannot parse.
 
  -- Joey Hess <id@joeyh.name>  Wed, 16 Sep 2015 12:23:33 -0400
 

doc/bugs/git-annex_rewrites_.ssh__47__config.mdwn

@@ -13,3 +13,5 @@ git-annex-5.20140717-8.fc24.x86_64
 
 ### Have you had any luck using git-annex before? (Sometimes we get tired of reading bug reports all day and a lil' positive end note does wonders)
 Has worked wonders for syncing keepass files between devices; just now setting up assistant to do things automatically though :) .
+
+> [[fixed|done]] --[[Joey]]

doc/bugs/git-annex_rewrites_.ssh__47__config/comment_5_4316aff6470006183e91004946387141._comment

@@ -0,0 +1,11 @@
+[[!comment format=mdwn
+ username="joey"
+ subject="""comment 5"""
+ date="2015-09-22T16:03:42Z"
+ content="""
+Well, it does seem legal to do that -- man page says a pattern can be 0 or
+more characters, and you have 0.
+
+I've put in a fix in the generator to avoid adding whitespace in this
+case.
+"""]]