Config: do not add spaces before units

Adding a space before the unit ('g', 'm', 'k) causes git to fail with
the error:

  fatal: bad numeric config value

Change-Id: I57f11d3a1cdcca4549858e773af1a2a80fc0369f
Signed-off-by: David Turner <dturner@twosigma.com>
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit/src/org/eclipse/jgit/lib/Config.java

 		final String s;
 
 		if (value >= GiB && (value % GiB) == 0)
-			s = String.valueOf(value / GiB) + " g"; //$NON-NLS-1$
+			s = String.valueOf(value / GiB) + "g"; //$NON-NLS-1$
 		else if (value >= MiB && (value % MiB) == 0)
-			s = String.valueOf(value / MiB) + " m"; //$NON-NLS-1$
+			s = String.valueOf(value / MiB) + "m"; //$NON-NLS-1$
 		else if (value >= KiB && (value % KiB) == 0)
-			s = String.valueOf(value / KiB) + " k"; //$NON-NLS-1$
+			s = String.valueOf(value / KiB) + "k"; //$NON-NLS-1$
 		else
 			s = String.valueOf(value);