add center seperators

powerline/config_files/themes/ascii.json

@@ -5,6 +5,10 @@
 			"hard": " ",
 			"soft": "| "
 		},
+		"center": {
+			"hard": " ",
+			"soft": "| "
+		},
 		"right": {
 			"hard": " ",
 			"soft": " |"

powerline/config_files/themes/powerline.json

@@ -4,6 +4,10 @@
 			"hard": " ",
 			"soft": " "
 		},
+		"center": {
+			"hard": " ",
+			"soft": "│ "
+		},
 		"right": {
 			"hard": " ",
 			"soft": " "

powerline/config_files/themes/powerline_terminus.json

@@ -4,6 +4,10 @@
 			"hard": " ",
 			"soft": " "
 		},
+		"center": {
+			"hard": " ",
+			"soft": "│ "
+		},
 		"right": {
 			"hard": " ",
 			"soft": " "

powerline/config_files/themes/powerline_unicode7.json

@@ -4,6 +4,10 @@
 			"hard": " ",
 			"soft": " "
 		},
+		"center": {
+			"hard": " ",
+			"soft": "│ "
+		},
 		"right": {
 			"hard": " ",
 			"soft": " "

powerline/config_files/themes/unicode.json

@@ -4,6 +4,10 @@
 			"hard": "▌ ",
 			"soft": "│ "
 		},
+		"center": {
+			"hard": " ",
+			"soft": "│ "
+		},
 		"right": {
 			"hard": " ▐",
 			"soft": " │"

powerline/config_files/themes/unicode_terminus_condensed.json

@@ -4,6 +4,10 @@
 			"hard": "▌",
 			"soft": "│"
 		},
+		"center": {
+			"hard": "",
+			"soft": "│"
+		},
 		"right": {
 			"hard": "▐",
 			"soft": "│"

powerline/renderer.py

@@ -582,7 +582,7 @@ class Renderer(object):
 			side = segment['side']
 			if not segment['literal_contents'][1]:
 				if segment is not last_segment:
-					compare_segment = next(iter((
+					next_segment = next(iter((
 						segment
 						for segment in segments[index + 1:]
 						if not segment['literal_contents'][1]