Doc: remove 'is' in 'is replaces'


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12847 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/docs/xml/manual-core.xml b/docs/xml/manual-core.xml
index b0916b1..9635676 100644
--- a/docs/xml/manual-core.xml
+++ b/docs/xml/manual-core.xml
@@ -1822,7 +1822,7 @@
     <listitem>
       <para>When a shared library is loaded, Valgrind checks for 
       functions in the library that must be replaced or wrapped.
-      For example, Memcheck is replaces all malloc related
+      For example, Memcheck replaces all malloc related
       functions (malloc, free, calloc, ...) with its own versions.
       Such replacements are done by default only in shared libraries whose
       soname matches a predefined soname pattern (e.g.