Fix typos: 'neccesary' should be 'necessary'.
git-svn-id: svn://svn.code.sf.net/p/fonttools/code/trunk@581 4cde692c-a291-49d1-8350-778aa11640f8
diff --git a/Doc/documentation.html b/Doc/documentation.html
index 3a42184..ccb9a7d 100644
--- a/Doc/documentation.html
+++ b/Doc/documentation.html
@@ -24,7 +24,7 @@
</ul>
<P>
-TTX detects what kind of files it is fed: it will output a .ttx file when it sees a .ttf or .otf, and it will compile a .ttf or .otf when the input file is a .ttx file. By default, the output file is created in the same folder as the input file, and will have the same name as the input file but with a different extension. TTX will <I>never</I> overwrite existing files, but if neccesary will append a unique number to the output filename (before the extension), eg.: "Arial#1.ttf".
+TTX detects what kind of files it is fed: it will output a .ttx file when it sees a .ttf or .otf, and it will compile a .ttf or .otf when the input file is a .ttx file. By default, the output file is created in the same folder as the input file, and will have the same name as the input file but with a different extension. TTX will <I>never</I> overwrite existing files, but if necessary will append a unique number to the output filename (before the extension), eg.: "Arial#1.ttf".
<P>
When using TTX from the command line there are a bunch of extra options, these are explained in the help text, as displayed when typing "ttx -h" at the command prompt. These additional options include: