* bug#7428: Bug in ediff's treatment of whitespace (this time with the attachments)
@ 2010-11-17 20:37 Tom Breton (Tehom)
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From: Tom Breton (Tehom) @ 2010-11-17 20:37 UTC (permalink / raw)
To: 7428
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**** Explanation of the bug:
Wordwise merging in ediff doesn't handle whitespace reasonably when
merging to a blank element. It just plops the non-blank element at the
end of whatever whitespace it ends up with, even across line breaks.
**** How it should work (IMO)
IMO it would be more correct to infer the division of whitespace from the
whitespace around the non-blank element.
**** Instructions for reproducing it
***** General orientation
Use the attached files:
* odd-whitespace-2-file1.{abc}.txt
* odd-whitespace-file1.{abc}.txt
I found it useful to give each set of {a,b,c} its own directory and keep
the filenames the same across directories. I can't attach them to this
email with directory names, though.
I found this code useful in seeing this bug, so I'm including it here. It
just starts an merge-with-ancestor with the respective files - saves time.
It expects filenames of the form file1.{a,b,c}.txt in different
directories.
(defun bug-ediff-merge-files-with-ancestor (dir)
""
(interactive "DDirectory: ")
(ediff-merge-files-with-ancestor
(expand-file-name "file1.a.txt" dir)
(expand-file-name "file1.b.txt" dir)
(expand-file-name "file1.c.txt" dir)))
***** Explicit instructions
* Merge file1.a.txt with file1.b.txt using ancestor file1.c.txt
* "n" to go to first clash
* "b" to partly merge - just so it's merging nicely and not seeing
"<<<<<<" ">>>>>>" "#####Ancestor" etc
* "=" to start an inferior merge
* "a" to compare to buffer A
* (Now in the inferior ediff)
* "n" to go to a line that still needs to be merged to the ancestor.
In the demo they're all of the form "Line N A".
* "a" to try to use the version from A.
* It doesn't merge right. It moves "A" to another place.
Both odd-whitespace-* and odd-whitespace-2-* exhibit similar unexpected
behavior.
Tom Breton (Tehom)
[-- Attachment #2: odd-whitespace-file1.a.txt --]
[-- Type: text/plain, Size: 85 bytes --]
Line 1
Line 2
Line 3 A
Line 4
Line 5 A
Line 6
Line 7 A
Line 8
Line 9
Line 10
[-- Attachment #3: odd-whitespace-file1.b.txt --]
[-- Type: text/plain, Size: 85 bytes --]
Line 1
Line 2
Line 3
Line 4 B
Line 5
Line 6 B
Line 7
Line 8 B
Line 9
Line 10
[-- Attachment #4: odd-whitespace-file1.c.txt --]
[-- Type: text/plain, Size: 79 bytes --]
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
Line 9
Line 10
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2010-11-17 20:37 bug#7428: Bug in ediff's treatment of whitespace (this time with the attachments) Tom Breton (Tehom)
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