The document contains many occurrences of U+0027 APOSTROPHE, apparently all after "n". According to http://www.motherlandnigeria.com/languages.html, apostrophe is not used, but <n, U+0304 COMBINING MACRON> is; <n, U+0303 COMBINING TILDE> according to http://ilc.igbonet.com/; and <n, U+0307 COMBINING DOT ABOVE> according to http://uwandiigbo.com/. In any case, there is no combining sequence with n in the document, so it seems that those apostrophes should really be some combining mark on the preceding "n".
The document contains many occurrences of U+0027 APOSTROPHE, apparently all after "n". According to http://www.motherlandnigeria.com/languages.html, apostrophe is not used, but <n, U+0304 COMBINING MACRON> is; <n, U+0303 COMBINING TILDE> according to http://ilc.igbonet.com/; and <n, U+0307 COMBINING DOT ABOVE> according to http://uwandiigbo.com/. In any case, there is no combining sequence with n in the document, so it seems that those apostrophes should really be some combining mark on the preceding "n".