Merge pull request #485 from Pranjalya/master

Fixed typo

Author: Erik Bernhardsson

README.rst

@@ -107,7 +107,7 @@ There are just two main parameters needed to tune Annoy: the number of trees ``n
 * ``n_trees`` is provided during build time and affects the build time and the index size. A larger value will give more accurate results, but larger indexes.
 * ``search_k`` is provided in runtime and affects the search performance. A larger value will give more accurate results, but will take longer time to return.
 
-If ``search_k`` is not provided, it will default to ``n * n_trees * D`` where ``n`` is the number of approximate nearest neighbors and ``D`` is a constant depending on the metric. Otherwise, ``search_k`` and ``n_trees`` are roughly independent, i.e. a the value of ``n_trees`` will not affect search time if ``search_k`` is held constant and vice versa. Basically it's recommended to set ``n_trees`` as large as possible given the amount of memory you can afford, and it's recommended to set ``search_k`` as large as possible given the time constraints you have for the queries.
+If ``search_k`` is not provided, it will default to ``n * n_trees * D`` where ``n`` is the number of approximate nearest neighbors and ``D`` is a constant depending on the metric. Otherwise, ``search_k`` and ``n_trees`` are roughly independent, i.e. the value of ``n_trees`` will not affect search time if ``search_k`` is held constant and vice versa. Basically it's recommended to set ``n_trees`` as large as possible given the amount of memory you can afford, and it's recommended to set ``search_k`` as large as possible given the time constraints you have for the queries.
 
 You can also accept slower search times in favour of reduced loading times, memory usage, and disk IO. On supported platforms the index is prefaulted during ``load`` and ``save``, causing the file to be pre-emptively read from disk into memory. If you set ``prefault`` to ``False``, pages of the mmapped index are instead read from disk and cached in memory on-demand, as necessary for a search to complete. This can significantly increase early search times but may be better suited for systems with low memory compared to index size, when few queries are executed against a loaded index, and/or when large areas of the index are unlikely to be relevant to search queries.