minor fix

diff --git a/mtail.py b/mtail.py
index 473d160..f266876 100755 (executable)
--- a/mtail.py
+++ b/mtail.py
@@ -136,7 +136,11 @@ example:
            print sys.argv[0],": WARNING : no file in scope"
            self.format="%s"
        else:
-           self.margin=max(*[len(f) for f in filenames])
+           if len(filenames)==1:
+                self.margin=len(filenames[0])
+            else:
+                # this stupidly fails when there's only 1 file
+                self.margin=max(*[len(f) for f in filenames])
            self.format="%%%ds"%self.margin
            if self.options.verbose:
                print 'Current set of files:',filenames