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This StackOverflow answer has an image of KDiff3 highlighting intra-line differences. Does someone know of a tool which can show the same (ex, via color) on the command line?
Another way to think of this is wanting to diff each difference in a patch file.
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diff stands for difference. This command is used to display the differences in the files by comparing the files line by line.
When two files are identical, what is the output of diff command? Explanation: When two files are identical, diff command does not produce any output. It simply returns the shell prompt $. However, we can use the -s option to display an informative message on the terminal if the files are identical.
On Unix-like operating systems, the diff command analyzes two files and prints the lines that are different. In essence, it outputs a set of instructions for how to change one file to make it identical to the second file.
The unified format (or unidiff) inherits the technical improvements made by the context format, but produces a smaller diff with old and new text presented immediately adjacent. Unified format is usually invoked using the " -u " command line option. This output is often used as input to the patch program.
I don't know if this is sufficiently command line for your purpose, but vimdiff can do this (even does colour). See for example the image in this related question.
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