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28.5.6 Combining the Two Versions

Sometimes you want to keep both alternatives for a particular difference. To do this, use x c, which edits the merge buffer like this:

#ifdef NEW
version from B buffer
#else /* not NEW */
version from A buffer
#endif /* not NEW */

While this example shows C preprocessor conditionals delimiting the two alternative versions, you can specify the strings to use by setting the variable emerge-combine-versions-template to a string of your choice. In the string, ‘%a’ says where to put version A, and ‘%b’ says where to put version B. The default setting, which produces the results shown above, looks like this:

'#ifdef NEW\n%b#else /* not NEW */\n%a#endif /* not NEW */\n'