typo closes #186
typo closes #185
typo fixes #184
fix typo, closes #183
fix typo, closes #182
fix typo, closes #181
fix typos, closes #180
fix typo, closes #179
fix typo, closes #178
fix typo, close #177
fix typo, closes #176
fix typo, closes #175
fix typo, closes #174
fix typo, closes #173
fix typo, closes #172
fix typo, closes #171
fix typo, closes #169
fix typo, closes #168
fix typos, closes #166
fix typo, closes #164