Initialize StringBuilder with known size

Change-Id: Iddbbd5c2209b5f133bba6d1bf396408b5da135ba
Signed-off-by: Paul Pazderski <paul-eclipse@ppazderski.de>
diff --git a/bundles/org.eclipse.team.ui/src/org/eclipse/team/internal/ui/Utils.java b/bundles/org.eclipse.team.ui/src/org/eclipse/team/internal/ui/Utils.java
index 7ea7072..5fad0c0 100644
--- a/bundles/org.eclipse.team.ui/src/org/eclipse/team/internal/ui/Utils.java
+++ b/bundles/org.eclipse.team.ui/src/org/eclipse/team/internal/ui/Utils.java
@@ -844,7 +844,7 @@
 		int subStrLen = (maxWidth - ellipsis.length()) / 2;
 		int addtl = (maxWidth - ellipsis.length()) % 2;
 
-		StringBuilder sb = new StringBuilder();
+		StringBuilder sb = new StringBuilder(maxWidth);
 		sb.append(textValue.substring(0, subStrLen));
 		sb.append(ellipsis);
 		sb.append(textValue.substring(length - subStrLen - addtl));