Frequent insertion of [”r;text”] where I entered ["text"]

I am using RH7.  With annoying frequency I find [”r;text”] where I entered ["text"], like so:

The replacement string has backward quotes as seen in my subject line.  Copy and paste, for some reason, does not bring them in here.  I have continually fixed manually, only to have them come back.  I have done a multi-file search and replace.  And they still return.

I can find no pattern.

• Usually, all quotes in a topic have been replaced if any have, but not always. 
• I have two RH projects, and it happens in both.
• It does not seem to affect topics based on when I last edited them.
• It is not related to building the .CHM file. 
• I had used RH7 for a number of months without the difficulty.  I only began seeing it after I reinstalled on a new computer, although I don't know if it  is related since I have no idea how long it had been happening before I noticed.

Why is this, and what do I do about it?