Documentation: turn middle-of-line tabs into spaces

These tabs happen to appear in columns where they don't stand out too
much, so the diff here is non-obvious. Some of these are rendered
differently by AsciiDoc and Asciidoctor (although the difference might
be invisible!), which is how I found a few of them. The remainder were
found using `git grep "[a-zA-Z.,)]$TAB[a-zA-Z]"`.

Signed-off-by: Martin Ågren <martin.agren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/git-ls-remote.txt

@@ -31,7 +31,7 @@ OPTIONS
 	displayed.
 
 --refs::
-	Do not show peeled tags or pseudorefs like HEAD	in the output.
+	Do not show peeled tags or pseudorefs like `HEAD` in the output.
 
 -q::
 --quiet::