Better wording

README.md

@@ -2680,7 +2680,7 @@ fixed, Vim trunk landed the `pyeval()` function which improved YCM performance
 even more since less time was spent serializing and deserializing data between
 Vim and the embedded Python interpreter. A few critical bugfixes for `pyeval()`
 landed in Vim 7.3.584 (and a few commits before that), and given the current
-availability of Vim 7.4.143, which packs improved events for text change
+availability of Vim 7.4.143, which features improved events for text change
 detection, it has been chosen.
 
 ### I get annoying messages in Vim's status area when I type

doc/youcompleteme.txt

@@ -2940,8 +2940,8 @@ were fixed, Vim trunk landed the 'pyeval()' function which improved YCM
 performance even more since less time was spent serializing and deserializing
 data between Vim and the embedded Python interpreter. A few critical bugfixes
 for 'pyeval()' landed in Vim 7.3.584 (and a few commits before that), and given
-the current availability of Vim 7.4.143, which packs improved events for text
-change detection, it has been chosen.
+the current availability of Vim 7.4.143, which features improved events for
+text change detection, it has been chosen.
 
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         *youcompleteme-i-get-annoying-messages-in-vims-status-area-when-i-type*