config doc: clarify "git config --path" example

Change the word "bla" to "section.variable"; "bla" is a placeholder
for a variable name but it wasn't clear for everyone.

While we're here, also reformat this sample command line to use
monospace instead of italics, to better match the rest of the file.

Use a space instead of a dash in "git config", as is common in the
rest of Git's documentation.

Reported-by: Robert P. J. Day <[email protected]>
Signed-off-by: MOY Matthieu <[email protected]>
Signed-off-by: Daniel Bensoussan <[email protected]>
Signed-off-by: Timothee Albertin <[email protected]>
Signed-off-by: Nathan Payre <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: Nathan Payre

Documentation/git-config.txt

@@ -174,11 +174,11 @@ See also <<FILES>>.
 	either --bool or --int, as described above.
 
 --path::
-	'git-config' will expand leading '{tilde}' to the value of
-	'$HOME', and '{tilde}user' to the home directory for the
+	`git config` will expand a leading `~` to the value of
+	`$HOME`, and `~user` to the home directory for the
 	specified user.  This option has no effect when setting the
-	value (but you can use 'git config bla {tilde}/' from the
-	command line to let your shell do the expansion).
+	value (but you can use `git config section.variable ~/`
+	from the command line to let your shell do the expansion).
 
 -z::
 --null::