> Date: Fri, 29 Jun 2012 04:05:15 -0400 > From: MBR <m...@arlsoft.com> > > In one Emacs window I have a buffer containing the following text: > > uarg=-Ujdbc:odbc:PLDBKSM-20120620 > #uarg=-Ujdbc:odbc:PLDBMartin-20120124 > > The buffer displayed by the other Emacs window contains: > > jdbcURL=jdbc:odbc:PLDBKSM-20120620 > > I'd intended to position the cursors in each window at the beginning of > each jdbc URL so I could compare them, but I forgot to, o the cursor was > on the first character in each window when I ran 'M-x compare-windows'. > Since the cursor in the first window was positioned on the "u" and in > the second window it was positioned on the "j", compare-windows should > have beeped and stopped without moving either cursor. Yet, much to my > surprise, the cursor (shown below as a '^') in the first window advanced to: > > uarg=-Ujdbc:odbc:PLDBKSM-20120620 > #uarg=-U^jdbc:odbc:PLDBMartin-20120124 > > and in the second window it advanced to: > > jdbcURL=^jdbc:odbc:PLDBKSM-20120620 > > This doesn't make any sense. Furthermore, since I still have 21.3.1 > installed, I tried the same thing in the old version, and it behaved as > I expected - i.e. compare-windows beeped without moving either cursor.
Didn't it also display the chunk between "j" and the cursor in some non-default background color? This shows you where the synchronization point is, and the text that is different between the two windows. IOW, this is a new feature, see the variable compare-windows-sync. If you dislike this behavior, set that variable to nil, and you will get the old behavior. This change was announced in NEWS of Emacs 22.1: *** M-x compare-windows now can automatically skip non-matching text to resync points in both windows.
