4.12.90 has invisible text in top line of 'info'

[Benno Schulenberg]

Hi,

After upgrading from texinfo-4.12 to 4.12.90, invoking 'info' with 
no arguments no longer shows this on the top line:

  File: dir,      Node: Top       This is the top of the INFO tree

Instead it just shows this:

  File: dir,

When using 'info -o file', the file does contain the normal top 
line.  When searching in 'info' for the string "is", the cursor 
jumps to the position where "is" in "This" would have been in the 
top line, and on a second search, three positions further.  So info 
thinks the text is there, it's just not visible.  Not on a Konsole, 
not on an xterm, not on a VT.  This worked fine in 4.12 and 4.11.

Benno