Discrepency in single-column format with --display=inline vs default (side-by-side)

[edwardpeek-crown]

Forcing single-column formatting using --display=inline has subtle formatting differences for certain changes that would show as single-column anyway with default options.

eg.

$ echo 'int("10", 10)' > a.py
$ echo 'int("10", base=10)' > b.py
$ difft a.py b.py 
b.py --- Python
1 int("10", base=10)

$ difft --display=inline a.py b.py 
b.py --- Python
1    int("10", 10)
   1 int("10", base=10)

With colour:

The automatic single-column format is a lot more readable in this example. Other examples also cause the forced single-line format to silently drop context lines and widen the readability gap to the default format.

Observed with cargo install version Difftastic 0.56.1 (built with rustc 1.75.0)

[edwardpeek-crown]

Another example, context lines in the middle of the diff are not shown:

$ echo 'print("a", "b", "c")' > a.py
$ echo -e 'print(\n    "a",\n    "b",\n    "c",\n    "d",\n)' > b.py
$ difft a.py b.py
b.py --- Python
1 1 print(
. 2     "a",
. 3     "b",
. 4     "c",
. 5     "d",
. 6 )

$ difft --display=inline a.py b.py 
b.py --- Python
1    print("a", "b", "c")
   4     "c",
   5     "d",
   6 )